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Substrate/Data/US-GDP/Real-GDP-Quarterly-1947-2025.csv
Daniel Miessler 3d700a33a8 Add U.S. GDP dataset with comprehensive documentation (1929-2025) 
Added authoritative U.S. GDP data from FRED/BEA covering 96 years of economic history:
- Real GDP quarterly data: Q1 1947 - Q2 2025 (314 data points)
- Real GDP annual data: 1929 - 2024 (96 data points)

Includes comprehensive research-backed documentation:
- Complete source verification (10 parallel research agents, 95%+ confidence)
- Full methodology documentation and data quality standards
- Download instructions, APIs, and update procedures
- Historical context from Great Depression through COVID-19

Updated main README with Data directory documentation and dataset comparison table.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-10-16 21:44:42 -07:00

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observation_date,GDPC1
1947-01-01,2182.681
1947-04-01,2176.892
1947-07-01,2172.432
1947-10-01,2206.452
1948-01-01,2239.682
1948-04-01,2276.690
1948-07-01,2289.770
1948-10-01,2292.364
1949-01-01,2260.807
1949-04-01,2253.128
1949-07-01,2276.424
1949-10-01,2257.352
1950-01-01,2346.104
1950-04-01,2417.682
1950-07-01,2511.127
1950-10-01,2559.214
1951-01-01,2593.967
1951-04-01,2638.898
1951-07-01,2693.259
1951-10-01,2699.156
1952-01-01,2727.954
1952-04-01,2733.800
1952-07-01,2753.517
1952-10-01,2843.941
1953-01-01,2896.811
1953-04-01,2919.206
1953-07-01,2902.785
1953-10-01,2858.845
1954-01-01,2845.192
1954-04-01,2848.305
1954-07-01,2880.482
1954-10-01,2936.852
1955-01-01,3020.746
1955-04-01,3069.910
1955-07-01,3111.379
1955-10-01,3130.068
1956-01-01,3117.922
1956-04-01,3143.694
1956-07-01,3140.874
1956-10-01,3192.570
1957-01-01,3213.011
1957-04-01,3205.970
1957-07-01,3237.386
1957-10-01,3203.894
1958-01-01,3120.724
1958-04-01,3141.224
1958-07-01,3213.884
1958-10-01,3289.032
1959-01-01,3352.129
1959-04-01,3427.667
1959-07-01,3430.057
1959-10-01,3439.832
1960-01-01,3517.181
1960-04-01,3498.246
1960-07-01,3515.385
1960-10-01,3470.278
1961-01-01,3493.703
1961-04-01,3553.021
1961-07-01,3621.252
1961-10-01,3692.289
1962-01-01,3758.147
1962-04-01,3792.149
1962-07-01,3838.776
1962-10-01,3851.421
1963-01-01,3893.482
1963-04-01,3937.183
1963-07-01,4023.755
1963-10-01,4050.147
1964-01-01,4135.553
1964-04-01,4180.592
1964-07-01,4245.918
1964-10-01,4259.046
1965-01-01,4362.111
1965-04-01,4417.225
1965-07-01,4515.427
1965-10-01,4619.458
1966-01-01,4731.888
1966-04-01,4748.046
1966-07-01,4788.254
1966-10-01,4827.537
1967-01-01,4870.299
1967-04-01,4873.287
1967-07-01,4919.392
1967-10-01,4956.477
1968-01-01,5057.553
1968-04-01,5142.033
1968-07-01,5181.859
1968-10-01,5202.212
1969-01-01,5283.597
1969-04-01,5299.625
1969-07-01,5334.600
1969-10-01,5308.556
1970-01-01,5300.652
1970-04-01,5308.164
1970-07-01,5357.077
1970-10-01,5299.672
1971-01-01,5443.619
1971-04-01,5473.059
1971-07-01,5518.072
1971-10-01,5531.032
1972-01-01,5632.649
1972-04-01,5760.470
1972-07-01,5814.854
1972-10-01,5912.220
1973-01-01,6058.544
1973-04-01,6124.506
1973-07-01,6092.301
1973-10-01,6150.131
1974-01-01,6097.258
1974-04-01,6111.751
1974-07-01,6053.978
1974-10-01,6030.464
1975-01-01,5957.035
1975-04-01,5999.610
1975-07-01,6102.326
1975-10-01,6184.530
1976-01-01,6323.649
1976-04-01,6370.025
1976-07-01,6404.895
1976-10-01,6451.177
1977-01-01,6527.703
1977-04-01,6654.466
1977-07-01,6774.457
1977-10-01,6774.592
1978-01-01,6796.260
1978-04-01,7058.920
1978-07-01,7129.915
1978-10-01,7225.750
1979-01-01,7238.727
1979-04-01,7246.454
1979-07-01,7300.281
1979-10-01,7318.535
1980-01-01,7341.557
1980-04-01,7190.289
1980-07-01,7181.743
1980-10-01,7315.677
1981-01-01,7459.022
1981-04-01,7403.745
1981-07-01,7492.405
1981-10-01,7410.768
1982-01-01,7295.631
1982-04-01,7328.912
1982-07-01,7300.896
1982-10-01,7303.817
1983-01-01,7400.066
1983-04-01,7568.456
1983-07-01,7719.746
1983-10-01,7880.794
1984-01-01,8034.847
1984-04-01,8173.670
1984-07-01,8252.465
1984-10-01,8320.199
1985-01-01,8400.820
1985-04-01,8474.787
1985-07-01,8604.220
1985-10-01,8668.188
1986-01-01,8749.127
1986-04-01,8788.524
1986-07-01,8872.601
1986-10-01,8920.193
1987-01-01,8986.367
1987-04-01,9083.256
1987-07-01,9162.024
1987-10-01,9319.332
1988-01-01,9367.502
1988-04-01,9490.594
1988-07-01,9546.206
1988-10-01,9673.405
1989-01-01,9771.725
1989-04-01,9846.293
1989-07-01,9919.228
1989-10-01,9938.767
1990-01-01,10047.386
1990-04-01,10083.855
1990-07-01,10090.569
1990-10-01,9998.704
1991-01-01,9951.916
1991-04-01,10029.510
1991-07-01,10080.195
1991-10-01,10115.329
1992-01-01,10236.435
1992-04-01,10347.429
1992-07-01,10449.673
1992-10-01,10558.648
1993-01-01,10576.275
1993-04-01,10637.847
1993-07-01,10688.606
1993-10-01,10833.987
1994-01-01,10939.116
1994-04-01,11087.361
1994-07-01,11152.176
1994-10-01,11279.932
1995-01-01,11319.951
1995-04-01,11353.721
1995-07-01,11450.310
1995-10-01,11528.067
1996-01-01,11614.418
1996-04-01,11808.140
1996-07-01,11914.063
1996-10-01,12037.775
1997-01-01,12115.472
1997-04-01,12317.221
1997-07-01,12471.010
1997-10-01,12577.495
1998-01-01,12703.742
1998-04-01,12821.339
1998-07-01,12982.752
1998-10-01,13191.670
1999-01-01,13315.597
1999-04-01,13426.748
1999-07-01,13604.771
1999-10-01,13827.980
2000-01-01,13878.147
2000-04-01,14130.908
2000-07-01,14145.312
2000-10-01,14229.765
2001-01-01,14183.120
2001-04-01,14271.694
2001-07-01,14214.516
2001-10-01,14253.574
2002-01-01,14372.785
2002-04-01,14460.848
2002-07-01,14519.633
2002-10-01,14537.580
2003-01-01,14614.141
2003-04-01,14743.567
2003-07-01,14988.782
2003-10-01,15162.760
2004-01-01,15248.680
2004-04-01,15366.850
2004-07-01,15512.619
2004-10-01,15670.880
2005-01-01,15844.727
2005-04-01,15922.782
2005-07-01,16047.587
2005-10-01,16136.734
2006-01-01,16353.835
2006-04-01,16396.151
2006-07-01,16420.738
2006-10-01,16561.866
2007-01-01,16611.690
2007-04-01,16713.314
2007-07-01,16809.587
2007-10-01,16915.191
2008-01-01,16843.003
2008-04-01,16943.291
2008-07-01,16854.295
2008-10-01,16485.350
2009-01-01,16298.262
2009-04-01,16269.145
2009-07-01,16326.281
2009-10-01,16502.754
2010-01-01,16582.710
2010-04-01,16743.162
2010-07-01,16872.266
2010-10-01,16960.864
2011-01-01,16920.632
2011-04-01,17035.114
2011-07-01,17031.313
2011-10-01,17222.583
2012-01-01,17367.010
2012-04-01,17444.525
2012-07-01,17469.650
2012-10-01,17489.852
2013-01-01,17662.400
2013-04-01,17709.671
2013-07-01,17860.450
2013-10-01,18016.147
2014-01-01,17953.974
2014-04-01,18185.911
2014-07-01,18406.941
2014-10-01,18500.031
2015-01-01,18666.621
2015-04-01,18782.243
2015-07-01,18857.418
2015-10-01,18892.206
2016-01-01,19001.690
2016-04-01,19062.709
2016-07-01,19197.938
2016-10-01,19304.352
2017-01-01,19398.343
2017-04-01,19506.949
2017-07-01,19660.766
2017-10-01,19882.352
2018-01-01,20044.077
2018-04-01,20150.476
2018-07-01,20276.154
2018-10-01,20304.874
2019-01-01,20431.641
2019-04-01,20602.275
2019-07-01,20843.322
2019-10-01,20985.448
2020-01-01,20709.212
2020-04-01,19077.992
2020-07-01,20558.879
2020-10-01,20791.917
2021-01-01,21082.134
2021-04-01,21440.929
2021-07-01,21617.828
2021-10-01,21988.737
2022-01-01,21932.710
2022-04-01,21967.045
2022-07-01,22125.625
2022-10-01,22278.345
2023-01-01,22439.607
2023-04-01,22580.499
2023-07-01,22840.989
2023-10-01,23033.780
2024-01-01,23082.119
2024-04-01,23286.508
2024-07-01,23478.570
2024-10-01,23586.542
2025-01-01,23548.210
2025-04-01,23770.976
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