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      "halvingTime": 16.5,
      "doublingTime": null
    },
    "sparkline": [
      [
        2.3105,
        1.5861
      ],
      [
        2.5506,
        1.5505
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      [
        2.766,
        1.4825
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      [
        2.8889,
        1.419
      ],
      [
        2.9889,
        1.3529
      ],
      [
        3.1149,
        1.3358
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      [
        3.1954,
        1.1477
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  },
  {
    "id": 113,
    "name": "Acrylonitrile",
    "category": "Chemicals",
    "description": "Production and price of Acrylonitri...",
    "yearRange": "1959-1972",
    "nDatapoints": 14,
    "hasExperienceCurve": true,
    "learningRate": 24.9,
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    "bStderr": 0.0371,
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    "lrCiHigh": 29.0,
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    "costLabel": "Price (1966 USD/lbs)",
    "timeTrend": {
      "annualPctChange": -7.31,
      "rSquared": 0.9101,
      "halvingTime": 9.1,
      "doublingTime": null
    },
    "sparkline": [
      [
        2.9643,
        1.4286
      ],
      [
        3.1407,
        1.2535
      ],
      [
        3.2993,
        1.1523
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      [
        3.4831,
        1.2087
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      [
        3.716,
        1.0622
      ],
      [
        3.8679,
        0.9951
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      [
        3.9729,
        0.9527
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    ]
  },
  {
    "id": 148,
    "name": "Polyvinylchloride",
    "category": "Chemicals",
    "description": "empirical data on experience curves",
    "yearRange": "1946-1968",
    "nDatapoints": 23,
    "hasExperienceCurve": true,
    "learningRate": 24.4,
    "rSquared": 0.881,
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    "bStderr": 0.0332,
    "lrCiLow": 20.7,
    "lrCiHigh": 28.0,
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      "annualPctChange": -7.05,
      "rSquared": 0.9527,
      "halvingTime": 9.5,
      "doublingTime": null
    },
    "sparkline": [
      [
        2.5647,
        -0.3288
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      [
        3.0892,
        -0.341
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      [
        3.3856,
        -0.3726
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      [
        3.601,
        -0.5258
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      [
        3.8559,
        -0.7399
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      [
        4.0931,
        -0.8125
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      [
        4.2679,
        -0.9101
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    ]
  },
  {
    "id": 101,
    "name": "Paraxylene",
    "category": "Chemicals",
    "description": "empirical data on experience curves",
    "yearRange": "1957-1968",
    "nDatapoints": 12,
    "hasExperienceCurve": true,
    "learningRate": 24.3,
    "rSquared": 0.9511,
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    "bStderr": 0.0303,
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    "lrCiHigh": 27.8,
    "pValue": 0.0,
    "costLabel": "Price (1958 USD)",
    "timeTrend": {
      "annualPctChange": -9.45,
      "rSquared": 0.9715,
      "halvingTime": 7.0,
      "doublingTime": null
    },
    "sparkline": [
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        2.4548,
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        2.7404,
        -0.8697
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        2.8808,
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        3.0969,
        -1.0757
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        3.2672,
        -1.0862
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        3.3655,
        -1.1549
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      [
        3.5315,
        -1.2441
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  },
  {
    "id": 111,
    "name": "BisphenolA",
    "category": "Chemicals",
    "description": "Production and price of BisphenolA.",
    "yearRange": "1959-1972",
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    "hasExperienceCurve": true,
    "learningRate": 24.3,
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    "bStderr": 0.0242,
    "lrCiLow": 21.4,
    "lrCiHigh": 27.0,
    "pValue": 0.0,
    "costLabel": "Price (1966 USD/lbs)",
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      "annualPctChange": -5.96,
      "rSquared": 0.964,
      "halvingTime": 11.3,
      "doublingTime": null
    },
    "sparkline": [
      [
        2.367,
        1.4473
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      [
        2.5147,
        1.442
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      [
        2.6385,
        1.4029
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        2.7784,
        1.3242
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        2.9797,
        1.2598
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      [
        3.1072,
        1.1797
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      [
        3.2225,
        1.113
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  },
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    "id": 158,
    "name": "Photovoltaics 4",
    "category": "Energy",
    "description": "",
    "yearRange": "1975-2025",
    "nDatapoints": 51,
    "hasExperienceCurve": true,
    "learningRate": 24.7,
    "rSquared": 0.9632,
    "b": 0.4093,
    "bStderr": 0.0114,
    "lrCiLow": 23.5,
    "lrCiHigh": 25.9,
    "pValue": 0.0,
    "costLabel": "Cost (2004 USD/Watt)",
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      "annualPctChange": -10.7,
      "rSquared": 0.9228,
      "halvingTime": 6.1,
      "doublingTime": null
    },
    "sparkline": [
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        -0.2676,
        1.9095
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        1.4662,
        1.1146
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      [
        2.49,
        0.8062
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      [
        3.0426,
        0.6003
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      [
        4.2615,
        0.4709
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      [
        5.6685,
        -0.5452
      ],
      [
        6.4942,
        -0.2147
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    ]
  },
  {
    "id": 137,
    "name": "SodiumChlorate",
    "category": "Chemicals",
    "description": "Production and price of SodiumChlor...",
    "yearRange": "1958-1972",
    "nDatapoints": 15,
    "hasExperienceCurve": true,
    "learningRate": 23.7,
    "rSquared": 0.8945,
    "b": 0.3897,
    "bStderr": 0.0371,
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    "lrCiHigh": 27.8,
    "pValue": 0.0,
    "costLabel": "Price (1966 USD/lbs)",
    "timeTrend": {
      "annualPctChange": -3.92,
      "rSquared": 0.9095,
      "halvingTime": 17.3,
      "doublingTime": null
    },
    "sparkline": [
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        2.7911,
        0.9315
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        2.8885,
        0.9169
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      [
        3.0335,
        0.9087
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      [
        3.1274,
        0.8699
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      [
        3.212,
        0.7784
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      [
        3.3303,
        0.7488
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      [
        3.4036,
        0.729
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    ]
  },
  {
    "id": 116,
    "name": "Cyclohexane",
    "category": "Chemicals",
    "description": "Production and price of Cyclohexane...",
    "yearRange": "1956-1972",
    "nDatapoints": 17,
    "hasExperienceCurve": true,
    "learningRate": 22.8,
    "rSquared": 0.9613,
    "b": 0.3731,
    "bStderr": 0.0193,
    "lrCiLow": 20.6,
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    "costLabel": "Price (1966 USD/lbs)",
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      "annualPctChange": -5.1,
      "rSquared": 0.9666,
      "halvingTime": 13.2,
      "doublingTime": null
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    "sparkline": [
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        2.6191,
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        2.7627,
        0.732
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      [
        2.8609,
        0.711
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        3.0542,
        0.5955
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      [
        3.2781,
        0.5709
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      [
        3.3952,
        0.498
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      [
        3.5288,
        0.3972
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    ]
  },
  {
    "id": 102,
    "name": "Low Density Polyethylene",
    "category": "Chemicals",
    "description": "empirical data on experience curves",
    "yearRange": "1952-1968",
    "nDatapoints": 17,
    "hasExperienceCurve": true,
    "learningRate": 21.5,
    "rSquared": 0.9418,
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    "bStderr": 0.0232,
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    "lrCiHigh": 24.1,
    "pValue": 0.0,
    "costLabel": "Price per Pound (1958 USD)",
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      "annualPctChange": -9.7,
      "rSquared": 0.9878,
      "halvingTime": 6.8,
      "doublingTime": null
    },
    "sparkline": [
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        3.3591,
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        3.9125,
        -0.7747
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        4.075,
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        4.2906,
        -0.9706
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  },
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    "id": 176,
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    "category": "Energy",
    "description": "The cost and net generation of elec...",
    "yearRange": "1980-2025",
    "nDatapoints": 46,
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    "costLabel": "Cost (2005 US cents/KWH)",
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      "annualPctChange": -2.26,
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    "sparkline": [
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        8.2814,
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        8.6118,
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      [
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        0.3141
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  },
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    "id": 256,
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    "category": "Energy",
    "description": "PV electricity production and cost.",
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      "halvingTime": 6.5,
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    "sparkline": [
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      [
        7.6958,
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      [
        8.3258,
        -0.1898
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        8.9066,
        -0.4168
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        9.5066,
        -0.4815
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      [
        11.7601,
        -1.0985
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      [
        12.7076,
        -1.5834
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    ]
  },
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    "id": 154,
    "name": "Electric Power",
    "category": "Energy",
    "description": "empirical data on experience curves",
    "yearRange": "1939-1968",
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    "hasExperienceCurve": true,
    "learningRate": 20.8,
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    "costLabel": "Price per KWH (1958 USD)",
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      "annualPctChange": -3.74,
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    "sparkline": [
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        3.3514,
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        3.5822,
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        3.8041,
        -0.7825
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        4.1649,
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  {
    "id": 14,
    "name": "Photovoltaics",
    "category": "Energy",
    "description": "World solar energy.",
    "yearRange": "1975-2025",
    "nDatapoints": 51,
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    "learningRate": 20.5,
    "rSquared": 0.9255,
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    "lrCiLow": 19.0,
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    "costLabel": "Price (USD/Wp)",
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      "annualPctChange": -8.72,
      "rSquared": 0.8863,
      "halvingTime": 7.6,
      "doublingTime": null
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    "sparkline": [
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        1.7709,
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      [
        2.5315,
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        3.0715,
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        4.4874,
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        5.6687,
        -0.4318
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      [
        6.6278,
        -1.0
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  },
  {
    "id": 30,
    "name": "Capillary DNA Sequencing",
    "category": "Biotechnology",
    "description": "The cost per 1000 bases and total c...",
    "yearRange": "2000-2025",
    "nDatapoints": 26,
    "hasExperienceCurve": true,
    "learningRate": 20.0,
    "rSquared": 0.9551,
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    "lrCiLow": 1600.0,
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    "pValue": 2.9e-05,
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      "annualPctChange": -49.69,
      "rSquared": 0.8585,
      "halvingTime": 1.0,
      "doublingTime": null
    },
    "sparkline": [
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        -0.6198,
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        1.2095,
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      [
        1.5386,
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      [
        1.7755,
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      [
        1.9696,
        0.0492
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        2.1004,
        -0.1192
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      [
        2.2181,
        -0.0132
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    ]
  },
  {
    "id": 155,
    "name": "Refined Cane Sugar",
    "category": "Consumer Goods",
    "description": "empirical data on experience curves",
    "yearRange": "1935-1968",
    "nDatapoints": 34,
    "hasExperienceCurve": true,
    "learningRate": 20.0,
    "rSquared": 0.4542,
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    "bStderr": 0.0634,
    "lrCiLow": 12.5,
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    "pValue": 1.7e-05,
    "costLabel": "Price (1958 USD)",
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      "annualPctChange": -0.52,
      "rSquared": 0.5028,
      "halvingTime": 133.8,
      "doublingTime": null
    },
    "sparkline": [
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        2.7853,
        -0.9516
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      [
        2.8162,
        -0.9751
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      [
        2.8519,
        -0.9555
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        2.8842,
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        2.917,
        -1.0269
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        2.9581,
        -0.9527
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      [
        2.989,
        -1.0526
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    ]
  },
  {
    "id": 6,
    "name": "Laser Diode",
    "category": "Hardware",
    "description": "Laser Diode Production",
    "yearRange": "1982-1994",
    "nDatapoints": 13,
    "hasExperienceCurve": true,
    "learningRate": 19.0,
    "rSquared": 0.9297,
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    "lrCiLow": 15.7,
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    "pValue": 0.0,
    "costLabel": "Price (Yen)",
    "timeTrend": {
      "annualPctChange": -29.26,
      "rSquared": 0.9319,
      "halvingTime": 2.0,
      "doublingTime": null
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    "sparkline": [
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        -1.0,
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      [
        1.0414,
        3.1761
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      [
        2.4771,
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        3.0607,
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      [
        3.2672,
        2.301
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      [
        3.7016,
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      [
        3.9243,
        2.1461
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  },
  {
    "id": 151,
    "name": "Titanium Sponge",
    "category": "Chemicals",
    "description": "empirical data on experience curves",
    "yearRange": "1950-1968",
    "nDatapoints": 19,
    "hasExperienceCurve": true,
    "learningRate": 17.5,
    "rSquared": 0.8031,
    "b": 0.2769,
    "bStderr": 0.0343,
    "lrCiLow": 13.2,
    "lrCiHigh": 21.5,
    "pValue": 0.0,
    "costLabel": "Price (1958 USD/lbs)",
    "timeTrend": {
      "annualPctChange": -11.03,
      "rSquared": 0.9148,
      "halvingTime": 5.9,
      "doublingTime": null
    },
    "sparkline": [
      [
        1.7634,
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      [
        3.5882,
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      [
        4.4948,
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      [
        4.7242,
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        4.8384,
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        4.9616,
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      [
        5.1335,
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  },
  {
    "id": 129,
    "name": "NeopreneRubber",
    "category": "Chemicals",
    "description": "Production and price of NeopreneRub...",
    "yearRange": "1960-1972",
    "nDatapoints": 13,
    "hasExperienceCurve": true,
    "learningRate": 16.5,
    "rSquared": 0.822,
    "b": 0.2602,
    "bStderr": 0.0365,
    "lrCiLow": 11.7,
    "lrCiHigh": 21.0,
    "pValue": 1.9e-05,
    "costLabel": "Price (1966 USD/lbs)",
    "timeTrend": {
      "annualPctChange": -2.15,
      "rSquared": 0.8823,
      "halvingTime": 31.9,
      "doublingTime": null
    },
    "sparkline": [
      [
        3.3619,
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      [
        3.4575,
        1.6435
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      [
        3.5371,
        1.6448
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      [
        3.6101,
        1.6199
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      [
        3.6744,
        1.5959
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      [
        3.7336,
        1.5692
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      [
        3.7878,
        1.536
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    ]
  },
  {
    "id": 87,
    "name": "SCGT",
    "category": "Energy",
    "description": "Single Cycle Gas Turbine Installed...",
    "yearRange": "1956-1978",
    "nDatapoints": 13,
    "hasExperienceCurve": true,
    "learningRate": 16.1,
    "rSquared": 0.9254,
    "b": 0.2526,
    "bStderr": 0.0359,
    "lrCiLow": 10.1,
    "lrCiHigh": 21.7,
    "pValue": 0.002144,
    "costLabel": "Price (1990 USD/kW)",
    "timeTrend": {
      "annualPctChange": -5.2,
      "rSquared": 0.7247,
      "halvingTime": 13.0,
      "doublingTime": null
    },
    "sparkline": [
      [
        1.7084,
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      [
        2.0035,
        2.8904
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      [
        2.482,
        2.7317
      ],
      [
        2.7705,
        2.7053
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      [
        2.9803,
        2.6877
      ],
      [
        3.0459,
        2.6789
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    ]
  },
  {
    "id": 149,
    "name": "Primary Aluminum",
    "category": "Chemicals",
    "description": "empirical data on experience curves",
    "yearRange": "1929-2025",
    "nDatapoints": 97,
    "hasExperienceCurve": true,
    "learningRate": 16.0,
    "rSquared": 0.7743,
    "b": 0.2522,
    "bStderr": 0.014,
    "lrCiLow": 14.4,
    "lrCiHigh": 17.6,
    "pValue": 0.0,
    "costLabel": "Price per Pound (1958 USD)",
    "timeTrend": {
      "annualPctChange": -1.57,
      "rSquared": 0.8217,
      "halvingTime": 43.8,
      "doublingTime": null
    },
    "sparkline": [
      [
        3.0732,
        -0.3161
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      [
        3.7301,
        -0.6478
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    "name": "Primary Magnesium",
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    "id": 305,
    "name": "Ocean Alkalinity Enhancement",
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    "id": 15,
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    "id": 86,
    "name": "CCGT Electricity",
    "category": "Energy",
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        -0.066
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      [
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      [
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      [
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        0.4546
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      [
        5.0339,
        0.5282
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      [
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        0.511
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    ]
  },
  {
    "id": 405,
    "name": "Phi-s Symbolic Efficacy Index",
    "category": "Composite Index",
    "description": "",
    "yearRange": "2012-2024",
    "nDatapoints": 8,
    "hasExperienceCurve": true,
    "learningRate": -4730.2,
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    "lrCiLow": -12246.3,
    "lrCiHigh": -1789.7,
    "pValue": 5.4e-05,
    "costLabel": "Phi_s Index (2012=1)",
    "timeTrend": {
      "annualPctChange": 346.77,
      "rSquared": 0.9962,
      "halvingTime": null,
      "doublingTime": 0.5
    },
    "sparkline": [
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      [
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      [
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        1.8747
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      [
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        2.7577
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      [
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        3.6455
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      [
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      [
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    ]
  },
  {
    "id": 404,
    "name": "AI Coding Capability (SWE-bench)",
    "category": "AI / Machine Learning",
    "description": "",
    "yearRange": "2023-2025",
    "nDatapoints": 7,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "bStderr": null,
    "lrCiLow": null,
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    "costLabel": "SWE-bench Score (%)",
    "timeTrend": {
      "annualPctChange": 302.25,
      "rSquared": 0.7409,
      "halvingTime": null,
      "doublingTime": 0.5
    },
    "sparkline": [
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      [
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        12.0
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      [
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        33.0
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        49.0
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      [
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        71.7
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      [
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        80.9
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      [
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        79.2
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  },
  {
    "id": 409,
    "name": "AI Reach Index",
    "category": "AI / Machine Learning",
    "description": "",
    "yearRange": "2012-2025",
    "nDatapoints": 14,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "b": null,
    "bStderr": null,
    "lrCiLow": null,
    "lrCiHigh": null,
    "pValue": null,
    "costLabel": "Reach Index",
    "timeTrend": {
      "annualPctChange": 78.57,
      "rSquared": 0.939,
      "halvingTime": null,
      "doublingTime": 1.2
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    "sparkline": [
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      [
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  },
  {
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    "name": "AI Training Compute Cost",
    "category": "AI / Machine Learning",
    "description": "",
    "yearRange": "2015-2025",
    "nDatapoints": 11,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "b": null,
    "bStderr": null,
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    "pValue": null,
    "costLabel": "Cost ($/PFLOP-day)",
    "timeTrend": {
      "annualPctChange": -44.37,
      "rSquared": 0.983,
      "halvingTime": 1.2,
      "doublingTime": null
    },
    "sparkline": [
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        8000.0
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      [
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        5000.0
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      [
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  },
  {
    "id": 306,
    "name": "Afforestation / Reforestation",
    "category": "Carbon Removal",
    "description": "",
    "yearRange": "2010-2025",
    "nDatapoints": 9,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "b": null,
    "bStderr": null,
    "lrCiLow": null,
    "lrCiHigh": null,
    "pValue": null,
    "costLabel": "Cost (nominal $/tCO2)",
    "timeTrend": {
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      "rSquared": 0.972,
      "halvingTime": 19.4,
      "doublingTime": null
    },
    "sparkline": [
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      [
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        16.0
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      [
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      [
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        14.0
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    ]
  },
  {
    "id": 408,
    "name": "Algorithmic Efficiency (1/PFLOP)",
    "category": "AI / Machine Learning",
    "description": "",
    "yearRange": "2012-2025",
    "nDatapoints": 14,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "b": null,
    "bStderr": null,
    "lrCiLow": null,
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    "pValue": null,
    "costLabel": "Capability per PFLOP",
    "timeTrend": {
      "annualPctChange": 61.28,
      "rSquared": 0.9886,
      "halvingTime": null,
      "doublingTime": 1.5
    },
    "sparkline": [
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      [
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      [
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        2500.0
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      [
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        6666.7
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      [
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      [
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        42187.5
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      [
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    ]
  },
  {
    "id": 403,
    "name": "Algorithmic Efficiency (ImageNet)",
    "category": "AI / Machine Learning",
    "description": "",
    "yearRange": "2012-2025",
    "nDatapoints": 9,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "b": null,
    "bStderr": null,
    "lrCiLow": null,
    "lrCiHigh": null,
    "pValue": null,
    "costLabel": "Compute Required (PFLOP)",
    "timeTrend": {
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      "rSquared": 0.9674,
      "halvingTime": 0.9,
      "doublingTime": null
    },
    "sparkline": [
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      [
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      [
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  },
  {
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    "name": "Bandwidth per cable length Cost (Undersea cable)",
    "category": "Information",
    "description": "Koh and Magee's Functional Approach...",
    "yearRange": "1858-2002",
    "nDatapoints": 28,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "b": null,
    "bStderr": null,
    "lrCiLow": null,
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    "pValue": null,
    "costLabel": "Bandwidth per cable length Cost ((kbps/km) / 2004 USD)",
    "timeTrend": {
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      "rSquared": 0.8843,
      "halvingTime": null,
      "doublingTime": 3.6
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    "sparkline": [
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      [
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      [
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      [
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    ]
  },
  {
    "id": 406,
    "name": "Compute Efficiency (GFLOPS/$)",
    "category": "AI / Machine Learning",
    "description": "",
    "yearRange": "2003-2025",
    "nDatapoints": 14,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "b": null,
    "bStderr": null,
    "lrCiLow": null,
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    "pValue": null,
    "costLabel": "GFLOPS per Dollar",
    "timeTrend": {
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      "rSquared": 0.9565,
      "halvingTime": null,
      "doublingTime": 2.4
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    "sparkline": [
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      [
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      [
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      [
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        14.3
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      [
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        50.0
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      [
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        52.4
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    ]
  },
  {
    "id": 181,
    "name": "Concentrating Solar",
    "category": "Energy",
    "description": "The dataset contains the cost of co...",
    "yearRange": "1980-2024",
    "nDatapoints": 41,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "b": null,
    "bStderr": null,
    "lrCiLow": null,
    "lrCiHigh": null,
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    "costLabel": "Cost (2005 US cents/KWH)",
    "timeTrend": {
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      "rSquared": 0.4713,
      "halvingTime": 25.0,
      "doublingTime": null
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    "sparkline": [
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      [
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      [
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        28.657
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      [
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      [
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  },
  {
    "id": 407,
    "name": "Energy Efficiency (GFLOPS/W)",
    "category": "AI / Machine Learning",
    "description": "",
    "yearRange": "2003-2025",
    "nDatapoints": 14,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "b": null,
    "bStderr": null,
    "lrCiLow": null,
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    "pValue": null,
    "costLabel": "GFLOPS per Watt",
    "timeTrend": {
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      "rSquared": 0.9602,
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      "doublingTime": 2.5
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    "sparkline": [
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      [
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      [
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        183.6
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      [
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        182.3
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  },
  {
    "id": 223,
    "name": "Energy Storage Density (Aggregate)",
    "category": "Energy",
    "description": "Progress in energy storage density.",
    "yearRange": "1884-2005",
    "nDatapoints": 85,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "b": null,
    "bStderr": null,
    "lrCiLow": null,
    "lrCiHigh": null,
    "pValue": null,
    "costLabel": "Energy Storage Density Performance (Wh/kg)",
    "timeTrend": {
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      "rSquared": 0.075,
      "halvingTime": null,
      "doublingTime": 26.4
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    "sparkline": [
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      [
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      [
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      [
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      [
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        125.0
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      [
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      [
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        2.66
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  },
  {
    "id": 229,
    "name": "Energy Storage Density (Capacitor)",
    "category": "Energy",
    "description": "Progress in energy storage density...",
    "yearRange": "1962-2005",
    "nDatapoints": 12,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "b": null,
    "bStderr": null,
    "lrCiLow": null,
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    "pValue": null,
    "costLabel": "Energy Storage Density (Wh/kg)",
    "timeTrend": {
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      "rSquared": 0.9581,
      "halvingTime": null,
      "doublingTime": 4.9
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    "sparkline": [
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      [
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      [
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      [
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      [
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      [
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        2.66
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    ]
  },
  {
    "id": 230,
    "name": "Energy Storage Density (Flywheel)",
    "category": "Energy",
    "description": "Progress in energy storage density...",
    "yearRange": "1975-2003",
    "nDatapoints": 8,
    "hasExperienceCurve": false,
    "learningRate": null,
    "rSquared": null,
    "b": null,
    "bStderr": null,
    "lrCiLow": null,
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    "pValue": null,
    "costLabel": "Energy Storage Density (Wh/kg)",
    "timeTrend": {
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      "rSquared": 0.8957,
      "halvingTime": null,
      "doublingTime": 7.5
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    "sparkline": [
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      [
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      [
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      [
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      [
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      [
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      [
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        82.0
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      [
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        116.0
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    ]
  },
  {
    "id": 231,
    "name": "Energy Storage Density (Lead-acid)",
    "category": "Energy",
    "description": "Progress in energy storage density...",
    "yearRange": "1884-2002",
    "nDatapoints": 27,
    "hasExperienceCurve": false,
    "learningRate": null,
    "rSquared": null,
    "b": null,
    "bStderr": null,
    "lrCiLow": null,
    "lrCiHigh": null,
    "pValue": null,
    "costLabel": "Energy Storage Density (Wh/kg)",
    "timeTrend": {
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      "rSquared": 0.7005,
      "halvingTime": null,
      "doublingTime": 49.1
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    "sparkline": [
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      [
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        16.5
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      [
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        29.1
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      [
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        34.0
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      [
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        25.0
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      [
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        35.0
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      [
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        80.0
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    ]
  },
  {
    "id": 232,
    "name": "Energy Storage Density (Li-ion)",
    "category": "Energy",
    "description": "Progress in energy storage density...",
    "yearRange": "1986-2024",
    "nDatapoints": 30,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "b": null,
    "bStderr": null,
    "lrCiLow": null,
    "lrCiHigh": null,
    "pValue": null,
    "costLabel": "Energy Storage Density (Wh/kg)",
    "timeTrend": {
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      "rSquared": 0.9752,
      "halvingTime": null,
      "doublingTime": 19.5
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    "sparkline": [
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      [
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      [
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      [
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        255.0
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      [
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        290.0
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    ]
  },
  {
    "id": 233,
    "name": "Energy Storage Density (Li-polymer)",
    "category": "Energy",
    "description": "Progress in energy storage density...",
    "yearRange": "1996-2004",
    "nDatapoints": 5,
    "hasExperienceCurve": false,
    "learningRate": null,
    "rSquared": null,
    "b": null,
    "bStderr": null,
    "lrCiLow": null,
    "lrCiHigh": null,
    "pValue": null,
    "costLabel": "Energy Storage Density (Wh/kg)",
    "timeTrend": {
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      "rSquared": 0.9935,
      "halvingTime": null,
      "doublingTime": 13.4
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    "sparkline": [
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      [
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        150.0
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      [
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        170.0
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      [
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        190.0
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    ]
  },
  {
    "id": 234,
    "name": "Energy Storage Density (NiCd)",
    "category": "Energy",
    "description": "Progress in energy storage density...",
    "yearRange": "1952-2004",
    "nDatapoints": 12,
    "hasExperienceCurve": false,
    "learningRate": null,
    "rSquared": null,
    "b": null,
    "bStderr": null,
    "lrCiLow": null,
    "lrCiHigh": null,
    "pValue": null,
    "costLabel": "Energy Storage Density (Wh/kg)",
    "timeTrend": {
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      "rSquared": 0.7814,
      "halvingTime": null,
      "doublingTime": 23.8
    },
    "sparkline": [
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        14.64
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      [
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        55.0
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      [
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        30.0
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      [
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        62.0
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      [
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        65.0
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      [
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        65.0
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      [
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        68.0
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    ]
  },
  {
    "id": 235,
    "name": "Energy Storage Density (NiMH)",
    "category": "Energy",
    "description": "Progress in energy storage density...",
    "yearRange": "1990-2004",
    "nDatapoints": 8,
    "hasExperienceCurve": false,
    "learningRate": null,
    "rSquared": null,
    "b": null,
    "bStderr": null,
    "lrCiLow": null,
    "lrCiHigh": null,
    "pValue": null,
    "costLabel": "Energy Storage Density (Wh/kg)",
    "timeTrend": {
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      "rSquared": 0.9506,
      "halvingTime": null,
      "doublingTime": 22.8
    },
    "sparkline": [
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        65.0
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      [
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        80.0
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      [
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        80.0
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      [
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        85.0
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      [
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        88.0
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      [
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        95.0
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      [
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        98.0
      ],
      [
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        101.0
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    ]
  },
  {
    "id": 224,
    "name": "Energy per Unit Cost (Aggregate)",
    "category": "Energy",
    "description": "Performance in energy per unit cost...",
    "yearRange": "1950-2005",
    "nDatapoints": 38,
    "hasExperienceCurve": false,
    "learningRate": null,
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    "b": null,
    "bStderr": null,
    "lrCiLow": null,
    "lrCiHigh": null,
    "pValue": null,
    "costLabel": "Energy per Unit Cost Performance (Wh/2005 USD)",
    "timeTrend": {
      "annualPctChange": -4.57,
      "rSquared": 0.0524,
      "halvingTime": 14.8,
      "doublingTime": null
    },
    "sparkline": [
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        3.94
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      [
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        3.94
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      [
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        6.98
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      [
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        11.2514
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      [
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        0.63
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      [
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        1.82
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      [
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        0.83
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  },
  {
    "id": 212,
    "name": "Information Storage Cost (Hard drive)",
    "category": "Information",
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