1observation_date,GDPC121947-01-01,2182.68131947-04-01,2176.89241947-07-01,2172.43251947-10-01,2206.45261948-01-01,2239.68271948-04-01,2276.69081948-07-01,2289.77091948-10-01,2292.364101949-01-01,2260.807111949-04-01,2253.128121949-07-01,2276.424131949-10-01,2257.352141950-01-01,2346.104151950-04-01,2417.682161950-07-01,2511.127171950-10-01,2559.214181951-01-01,2593.967191951-04-01,2638.898201951-07-01,2693.259211951-10-01,2699.156221952-01-01,2727.954231952-04-01,2733.800241952-07-01,2753.517251952-10-01,2843.941261953-01-01,2896.811271953-04-01,2919.206281953-07-01,2902.785291953-10-01,2858.845301954-01-01,2845.192311954-04-01,2848.305321954-07-01,2880.482331954-10-01,2936.852341955-01-01,3020.746351955-04-01,3069.910361955-07-01,3111.379371955-10-01,3130.068381956-01-01,3117.922391956-04-01,3143.694401956-07-01,3140.874411956-10-01,3192.570421957-01-01,3213.011431957-04-01,3205.970441957-07-01,3237.386451957-10-01,3203.894461958-01-01,3120.724471958-04-01,3141.224481958-07-01,3213.884491958-10-01,3289.032501959-01-01,3352.129511959-04-01,3427.667521959-07-01,3430.057531959-10-01,3439.832541960-01-01,3517.181551960-04-01,3498.246561960-07-01,3515.385571960-10-01,3470.278581961-01-01,3493.703591961-04-01,3553.021601961-07-01,3621.252611961-10-01,3692.289621962-01-01,3758.147631962-04-01,3792.149641962-07-01,3838.776651962-10-01,3851.421661963-01-01,3893.482671963-04-01,3937.183681963-07-01,4023.755691963-10-01,4050.147701964-01-01,4135.553711964-04-01,4180.592721964-07-01,4245.918731964-10-01,4259.046741965-01-01,4362.111751965-04-01,4417.225761965-07-01,4515.427771965-10-01,4619.458781966-01-01,4731.888791966-04-01,4748.046801966-07-01,4788.254811966-10-01,4827.537821967-01-01,4870.299831967-04-01,4873.287841967-07-01,4919.392851967-10-01,4956.477861968-01-01,5057.553871968-04-01,5142.033881968-07-01,5181.859891968-10-01,5202.212901969-01-01,5283.597911969-04-01,5299.625921969-07-01,5334.600931969-10-01,5308.556941970-01-01,5300.652951970-04-01,5308.164961970-07-01,5357.077971970-10-01,5299.672981971-01-01,5443.619991971-04-01,5473.0591001971-07-01,5518.0721011971-10-01,5531.0321021972-01-01,5632.6491031972-04-01,5760.4701041972-07-01,5814.8541051972-10-01,5912.2201061973-01-01,6058.5441071973-04-01,6124.5061081973-07-01,6092.3011091973-10-01,6150.1311101974-01-01,6097.2581111974-04-01,6111.7511121974-07-01,6053.9781131974-10-01,6030.4641141975-01-01,5957.0351151975-04-01,5999.6101161975-07-01,6102.3261171975-10-01,6184.5301181976-01-01,6323.6491191976-04-01,6370.0251201976-07-01,6404.8951211976-10-01,6451.1771221977-01-01,6527.7031231977-04-01,6654.4661241977-07-01,6774.4571251977-10-01,6774.5921261978-01-01,6796.2601271978-04-01,7058.9201281978-07-01,7129.9151291978-10-01,7225.7501301979-01-01,7238.7271311979-04-01,7246.4541321979-07-01,7300.2811331979-10-01,7318.5351341980-01-01,7341.5571351980-04-01,7190.2891361980-07-01,7181.7431371980-10-01,7315.6771381981-01-01,7459.0221391981-04-01,7403.7451401981-07-01,7492.4051411981-10-01,7410.7681421982-01-01,7295.6311431982-04-01,7328.9121441982-07-01,7300.8961451982-10-01,7303.8171461983-01-01,7400.0661471983-04-01,7568.4561481983-07-01,7719.7461491983-10-01,7880.7941501984-01-01,8034.8471511984-04-01,8173.6701521984-07-01,8252.4651531984-10-01,8320.1991541985-01-01,8400.8201551985-04-01,8474.7871561985-07-01,8604.2201571985-10-01,8668.1881581986-01-01,8749.1271591986-04-01,8788.5241601986-07-01,8872.6011611986-10-01,8920.1931621987-01-01,8986.3671631987-04-01,9083.2561641987-07-01,9162.0241651987-10-01,9319.3321661988-01-01,9367.5021671988-04-01,9490.5941681988-07-01,9546.2061691988-10-01,9673.4051701989-01-01,9771.7251711989-04-01,9846.2931721989-07-01,9919.2281731989-10-01,9938.7671741990-01-01,10047.3861751990-04-01,10083.8551761990-07-01,10090.5691771990-10-01,9998.7041781991-01-01,9951.9161791991-04-01,10029.5101801991-07-01,10080.1951811991-10-01,10115.3291821992-01-01,10236.4351831992-04-01,10347.4291841992-07-01,10449.6731851992-10-01,10558.6481861993-01-01,10576.2751871993-04-01,10637.8471881993-07-01,10688.6061891993-10-01,10833.9871901994-01-01,10939.1161911994-04-01,11087.3611921994-07-01,11152.1761931994-10-01,11279.9321941995-01-01,11319.9511951995-04-01,11353.7211961995-07-01,11450.3101971995-10-01,11528.0671981996-01-01,11614.4181991996-04-01,11808.1402001996-07-01,11914.0632011996-10-01,12037.7752021997-01-01,12115.4722031997-04-01,12317.2212041997-07-01,12471.0102051997-10-01,12577.4952061998-01-01,12703.7422071998-04-01,12821.3392081998-07-01,12982.7522091998-10-01,13191.6702101999-01-01,13315.5972111999-04-01,13426.7482121999-07-01,13604.7712131999-10-01,13827.9802142000-01-01,13878.1472152000-04-01,14130.9082162000-07-01,14145.3122172000-10-01,14229.7652182001-01-01,14183.1202192001-04-01,14271.6942202001-07-01,14214.5162212001-10-01,14253.5742222002-01-01,14372.7852232002-04-01,14460.8482242002-07-01,14519.6332252002-10-01,14537.5802262003-01-01,14614.1412272003-04-01,14743.5672282003-07-01,14988.7822292003-10-01,15162.7602302004-01-01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