{
  "schemaVersion": "1",
  "dataVersion": "gdpca-2026-09-30",
  "methodVersion": "gdp-calendar-v1",
  "label": "GDP article edition · September 30, 2026",
  "manifestUrl": "/data/gdp/2026-09-30/edition.json",
  "coverage": "1974–2025",
  "completedComparisonCoverage": "12 completed four-calendar-year windows · 1977–2024",
  "source": {
    "agency": "U.S. Bureau of Economic Analysis; republished by the Federal Reserve Bank of St. Louis",
    "producer": "U.S. Bureau of Economic Analysis",
    "republisher": "Federal Reserve Bank of St. Louis",
    "seriesId": "GDPCA",
    "accountCode": "A191RX",
    "sourceUrl": "https://fred.stlouisfed.org/data/GDPCA",
    "definitionUrl": "https://fred.stlouisfed.org/series/GDPCA",
    "updatedOn": "2026-09-30",
    "updatedAtSource": "2026-09-30 7:53 AM CDT",
    "retrievedOn": "2026-10-06",
    "retrievalDateBasis": "client local date",
    "responseDateUtc": "2026-10-05T21:11:36Z",
    "dateLabel": "Source updated September 30, 2026; retrieved October 6, 2026 (client local date)",
    "frequency": "annual",
    "seasonalAdjustment": "Not seasonally adjusted",
    "unit": "Billions of chained 2017 dollars",
    "sourceCoverage": "1929–2025"
  },
  "rawSource": {
    "url": "/data/gdp/2026-09-30/GDPCA-source.txt",
    "mediaType": "text/html",
    "sha256": "faf8c7b25815062f49c50699acb336b676450b0e1fba13a8e333cc697fb3ebfc",
    "observations": 97
  },
  "normalizedFile": {
    "url": "/data/gdp/2026-09-30/gdp-annual.csv",
    "sha256": "d8c7744a1f60a80f9b7867e3cf63dd3a7e22294c234da4da5144d7b736df3d12",
    "observations": 52
  },
  "methods": {
    "full": {
      "baseline": "Annual-average GDP in the calendar year before the term",
      "end": "Annual-average GDP in year 4",
      "years": 4
    },
    "later": {
      "baseline": "Annual-average GDP in year 1",
      "end": "Annual-average GDP in year 4",
      "years": 3,
      "qualification": "Years 2–4 is a sensitivity check, not a causal policy lag or assignment of year 1 to a predecessor."
    },
    "annualGrowth": "100 × (GDP[y] / GDP[y−1] − 1)",
    "cumulativeChange": "100 × (GDP[end] / GDP[baseline] − 1)",
    "annualizedGrowth": "100 × ((GDP[end] / GDP[baseline])^(1 / years) − 1)",
    "index": "100 × GDP[y] / GDP[baseline]"
  },
  "notes": [
    "Frozen statistical edition, not a live latest-vintage feed.",
    "Annual GDP levels are annual averages, not inauguration-day snapshots or annualized quarterly growth.",
    "Calendar windows include January before inauguration. Observed outcomes do not isolate presidential causation.",
    "Two preceding years and the following year provide context and are excluded from a term’s rank.",
    "Trump II remains incomplete, with only the 2025 annual observation in this edition; no later values are forecast.",
    "Blind record v1 and expanded v2 retain their original April 9, 2026 GDP inputs and share semantics."
  ],
  "observations": [
    {
      "year": 1974,
      "value": 6073.363
    },
    {
      "year": 1975,
      "value": 6060.875
    },
    {
      "year": 1976,
      "value": 6387.437
    },
    {
      "year": 1977,
      "value": 6682.804
    },
    {
      "year": 1978,
      "value": 7052.711
    },
    {
      "year": 1979,
      "value": 7275.999
    },
    {
      "year": 1980,
      "value": 7257.316
    },
    {
      "year": 1981,
      "value": 7441.485
    },
    {
      "year": 1982,
      "value": 7307.314
    },
    {
      "year": 1983,
      "value": 7642.266
    },
    {
      "year": 1984,
      "value": 8195.295
    },
    {
      "year": 1985,
      "value": 8537.004
    },
    {
      "year": 1986,
      "value": 8832.611
    },
    {
      "year": 1987,
      "value": 9137.745
    },
    {
      "year": 1988,
      "value": 9519.427
    },
    {
      "year": 1989,
      "value": 9869.003
    },
    {
      "year": 1990,
      "value": 10055.129
    },
    {
      "year": 1991,
      "value": 10044.238
    },
    {
      "year": 1992,
      "value": 10398.046
    },
    {
      "year": 1993,
      "value": 10684.179
    },
    {
      "year": 1994,
      "value": 11114.647
    },
    {
      "year": 1995,
      "value": 11413.012
    },
    {
      "year": 1996,
      "value": 11843.599
    },
    {
      "year": 1997,
      "value": 12370.299
    },
    {
      "year": 1998,
      "value": 12924.876
    },
    {
      "year": 1999,
      "value": 13543.774
    },
    {
      "year": 2000,
      "value": 14096.033
    },
    {
      "year": 2001,
      "value": 14230.726
    },
    {
      "year": 2002,
      "value": 14472.712
    },
    {
      "year": 2003,
      "value": 14877.312
    },
    {
      "year": 2004,
      "value": 15449.757
    },
    {
      "year": 2005,
      "value": 15987.957
    },
    {
      "year": 2006,
      "value": 16433.148
    },
    {
      "year": 2007,
      "value": 16762.445
    },
    {
      "year": 2008,
      "value": 16781.485
    },
    {
      "year": 2009,
      "value": 16349.11
    },
    {
      "year": 2010,
      "value": 16789.75
    },
    {
      "year": 2011,
      "value": 17052.41
    },
    {
      "year": 2012,
      "value": 17442.759
    },
    {
      "year": 2013,
      "value": 17812.167
    },
    {
      "year": 2014,
      "value": 18261.714
    },
    {
      "year": 2015,
      "value": 18799.622
    },
    {
      "year": 2016,
      "value": 19141.672
    },
    {
      "year": 2017,
      "value": 19612.102
    },
    {
      "year": 2018,
      "value": 20193.896
    },
    {
      "year": 2019,
      "value": 20715.671
    },
    {
      "year": 2020,
      "value": 20284.5
    },
    {
      "year": 2021,
      "value": 21556.002
    },
    {
      "year": 2022,
      "value": 22079.726
    },
    {
      "year": 2023,
      "value": 22724.135
    },
    {
      "year": 2024,
      "value": 23394.892
    },
    {
      "year": 2025,
      "value": 23943.305
    }
  ]
}