Quarter	US Dollars, monthly level
1960-01-01	600703446.4811311
1960-04-01	626691170.0229590
1960-07-01	624385659.1529120
1960-10-01	716961284.0904370
1961-01-01	632375133.2411640
1961-04-01	693122158.3119520
1961-07-01	676495083.5254980
1961-10-01	745672140.6093060
1962-01-01	683932228.7749160
1962-04-01	761051498.0770900
1962-07-01	683114836.8899131
1962-10-01	806330286.4232820
1963-01-01	658210223.3124770
1963-04-01	783091950.3742660
1963-07-01	824516351.8856000
1963-10-01	927091476.1421330
1964-01-01	809852035.6003460
1964-04-01	951449304.1084240
1964-07-01	857434425.1743430
1964-10-01	1072683997.2812301
1965-01-01	948253277.5198420
1965-04-01	976159096.9662460
1965-07-01	937736431.0178210
1965-10-01	1119691314.1077201
1966-01-01	977839110.3507430
1966-04-01	1100301695.4690200
1966-07-01	993889031.4113060
1966-10-01	1179356813.7515300
1967-01-01	1044642895.7120600
1967-04-01	1237986356.2422900
1967-07-01	1019396463.0904399
1967-10-01	1235190616.0800700
1968-01-01	1164108347.3170600
1968-04-01	1210243150.2002300
1968-07-01	1183152633.6605600
1968-10-01	1357534227.2003200
1969-01-01	1316763933.1283200
1969-04-01	1432700322.5399399
1969-07-01	1349527164.0744100
1969-10-01	1599063356.0692900
1970-01-01	1488766642.3003302
1970-04-01	1705488217.6440800
1970-07-01	1624008335.6965300
1970-10-01	1933931778.4862400
1971-01-01	1801932097.5857000
1971-04-01	1900705200.7329300
1971-07-01	1715654162.4542400
1971-10-01	2071656727.8504000
1972-01-01	2002870839.8859098
1972-04-01	2167422187.3792996
1972-07-01	2057480925.1068200
1972-10-01	2541177033.6197600
1973-01-01	2774706670.2943697
1973-04-01	2988188767.3080700
1973-07-01	2918509810.4359100
1973-10-01	3556437103.3869900
1974-01-01	3348952454.3408900
1974-04-01	4098479259.2022696
1974-07-01	3953131373.5298700
1974-10-01	4560332148.0458600
1975-01-01	4589264676.8063500
1975-04-01	4697608557.9941810
1975-07-01	3648725609.9450700
1975-10-01	4452656287.8698200
1976-01-01	4412548486.0645000
1976-04-01	4597425260.9276800
1976-07-01	4394991887.3329910
1976-10-01	5071574658.3782890
1977-01-01	4817100475.5408700
1977-04-01	4945476634.1972800
1977-07-01	4080340220.6408696
1977-10-01	5246462038.9545300
1978-01-01	4968893254.1468000
1978-04-01	5559239311.3855700
1978-07-01	4813049392.4677910
1978-10-01	6456034977.0095000
1979-01-01	6174347478.7922300
1979-04-01	6872789538.7833200
1979-07-01	6390855697.6991300
1979-10-01	8168537184.4504090
1980-01-01	8159352401.0428505
1980-04-01	7055482020.0612200
1980-07-01	7413777799.5878500
1980-10-01	8339637155.8756490
1981-01-01	7554110551.2935700
1981-04-01	7398501772.3635800
1981-07-01	6072910365.2163990
1981-10-01	7653371444.9349100
1982-01-01	7064676752.9422700
1982-04-01	7165401532.3463800
1982-07-01	5977271675.8121395
1982-10-01	6604210978.6845900
1983-01-01	6862208650.4413800
1983-04-01	7095066166.3256200
1983-07-01	6021273356.2600400
1983-10-01	7465134795.7925500
1984-01-01	7871054592.6436500
1984-04-01	7430279552.7329890
1984-07-01	6309744113.2268800
1984-10-01	7762267608.1102600
1985-01-01	6834395086.9779200
1985-04-01	7461824975.5685210
1985-07-01	7100263396.7505300
1985-10-01	9067971162.0792900
1986-01-01	8715710515.5651200
1986-04-01	9747300065.8648400
1986-07-01	8564541833.2478990
1986-10-01	10235968410.7002010
1987-01-01	10474909296.0541000
1987-04-01	11272631534.1588000
1987-07-01	9803274796.1188800
1987-10-01	12973096106.4061990
1988-01-01	12121347837.0817000
1988-04-01	13237787815.5536000
1988-07-01	10572667160.8293000
1988-10-01	13941088961.1799010
1989-01-01	13226385529.4132000
1989-04-01	13350759051.8690990
1989-07-01	11240584869.6146000
1989-10-01	13787995177.6170000
1990-01-01	14368723185.1085000
1990-04-01	14431393511.2883000
1990-07-01	12649302152.0467000
1990-10-01	16061907355.9799000
1991-01-01	14945969326.7714000
1991-04-01	14127904756.5585000
1991-07-01	11623777510.3801000
1991-10-01	14536894583.2309000
1992-01-01	14625021657.4690000
1992-04-01	14136607083.3769990
1992-07-01	13779331315.4259000
1992-10-01	13589746340.9392000
1993-01-01	12129459663.2231000
1993-04-01	12801779740.6857000
1993-07-01	11699713462.7575020
1993-10-01	13211753420.4600000
1994-01-01	13905472798.7145000
1994-04-01	14837444748.4816000
1994-07-01	13922272403.2913990
1994-10-01	18684465827.5791000
1995-01-01	19252003147.1770970
1995-04-01	19920467768.3537980
1995-07-01	18298614213.7320020
1995-10-01	22329554278.8335000
1996-01-01	21358259754.5475000
1996-04-01	21658458607.6490970
1996-07-01	19338714390.3328000
1996-10-01	22528058213.3929000
1997-01-01	20051924398.7320020
1997-04-01	21355463955.5128970
1997-07-01	19128823129.5664980
1997-10-01	22413023846.3156000
1998-01-01	20893133190.7999000
1998-04-01	21452831496.8504000
1998-07-01	19764725119.1229020
1998-10-01	22893105553.4811970
1999-01-01	21046463660.6881030
1999-04-01	20859293832.9801980
1999-07-01	20071002797.5392000
1999-10-01	23074986747.3571000
2000-01-01	22350871766.2431000
2000-04-01	22780260397.2903000
2000-07-01	20462728606.8824000
2000-10-01	22146797439.2044000
2001-01-01	21146188065.0998000
2001-04-01	19498563988.5931000
2001-07-01	17598091500.7399020
2001-10-01	19887640564.8910030
2002-01-01	19457649847.8378000
2002-04-01	21119533437.6974000
2002-07-01	19679697688.4848020
2002-10-01	22819077963.1508980
2003-01-01	24226693143.4202000
2003-04-01	26116229364.7305000
2003-07-01	23902725765.6681020
2003-10-01	28283840729.3137970
2004-01-01	29568407586.5214000
2004-04-01	31096613197.1245000
2004-07-01	28560538031.0372000
2004-10-01	34140124521.1553000
2005-01-01	32510189759.6564000
2005-04-01	34450275606.8102000
2005-07-01	31038059814.3115000
2005-10-01	32878898709.2634050
2006-01-01	35077032959.7803000
2006-04-01	37167605504.6669000
2006-07-01	34937630420.8025000
2006-10-01	40813874762.6505000
2007-01-01	40140126007.3332000
2007-04-01	41842227088.0077000
2007-07-01	39693351412.1539000
2007-10-01	47331177521.0327000
2008-01-01	49004546307.6597000
2008-04-01	52808775032.1291960
2008-07-01	45431195589.0692000
2008-10-01	36497211012.7382000
2009-01-01	29621600336.8806000
2009-04-01	31775179048.7998000
2009-07-01	32805206053.7669030
2009-10-01	36665659250.2908000
2010-01-01	36207264044.1242000
2010-04-01	38385079709.0765000
2010-07-01	38440059473.5604000
2010-10-01	45476641227.1030040
2011-01-01	46904659262.7028000
2011-04-01	48917337876.2603000
2011-07-01	46020007236.2594000
2011-10-01	45184358559.8182000
2012-01-01	44772365715.2030000
2012-04-01	43913411843.2271040
2012-07-01	40869546470.0952000
2012-10-01	43042911918.3995000
2013-01-01	42386046978.7236000
2013-04-01	42283748364.1279000
2013-07-01	39997606354.2262950
2013-10-01	42853866700.9757000
2014-01-01	42769904976.9851000
2014-04-01	43237425330.0970000
2014-07-01	39446734291.7807000
2014-10-01	39222300672.7520000
2015-01-01	34855746125.1947000
2015-04-01	36254862415.2697000
2015-07-01	33404411890.4733960
2015-10-01	35591160992.1655960
2016-01-01	33782464329.7058030
2016-04-01	36419832080.2400000
2016-07-01	33149071316.6493000
2016-10-01	36029635045.5399000
2017-01-01	36159873110.2124000
2017-04-01	37452427636.5755000
2017-07-01	37567455860.9656000
2017-10-01	41758714957.6361000
2018-01-01	42593068418.9290000
2018-04-01	42345855526.3260960
2018-07-01	38410143829.3122940