Quarter	US Dollars, monthly level
1960-01-01	883431440.9013760
1960-04-01	957517926.3284260
1960-07-01	1051759866.7524799
1960-10-01	1163519454.2385302
1961-01-01	949427720.0758910
1961-04-01	1011082623.8852899
1961-07-01	1073603294.6028500
1961-10-01	1187065679.7471500
1962-01-01	1026758141.9580101
1962-04-01	1183954307.7250700
1962-07-01	1306782267.4558200
1962-10-01	1389334627.7148200
1963-01-01	1129953562.2786300
1963-04-01	1281882651.1695500
1963-07-01	1407887772.7913198
1963-10-01	1607491780.8497400
1964-01-01	1300556866.8270600
1964-04-01	1562004621.0465900
1964-07-01	1718478214.8184600
1964-10-01	2057979573.1367000
1965-01-01	1824747635.5375700
1965-04-01	2093188923.8925798
1965-07-01	2216321861.3853498
1965-10-01	2280938549.0936500
1966-01-01	2085594576.8269398
1966-04-01	2321796962.1447000
1966-07-01	2505009175.2249002
1966-10-01	2799672923.3986200
1967-01-01	2261541770.5633600
1967-04-01	2532076429.7727300
1967-07-01	2712322211.4763200
1967-10-01	2874069509.0540300
1968-01-01	2593997324.1827803
1968-04-01	3149716424.4086600
1968-07-01	3389215026.7238700
1968-10-01	3826173626.8933897
1969-01-01	3327581814.0335402
1969-04-01	3887519601.6111100
1969-07-01	4249790541.9244804
1969-10-01	4597347686.4597610
1970-01-01	4142349450.8037295
1970-04-01	4674147935.6139300
1970-07-01	5062666654.2655200
1970-10-01	5538085445.2028900
1971-01-01	5081579477.0850200
1971-04-01	5879476500.5253300
1971-07-01	6372567569.8632200
1971-10-01	6788207689.7197400
1972-01-01	6154081168.8311700
1972-04-01	6565600649.3506500
1972-07-01	7515334415.5844200
1972-10-01	8356126623.3766190
1973-01-01	7683839136.5348410
1973-04-01	8631479251.9341500
1973-07-01	9623462579.2398200
1973-10-01	11039138430.7280000
1974-01-01	10364615179.4268000
1974-04-01	13696833987.6638000
1974-07-01	14858650862.4786000
1974-10-01	16505793546.2662010
1975-01-01	13217404923.3470000
1975-04-01	13627250942.7403000
1975-07-01	13679749726.6346020
1975-10-01	15177848669.2074000
1976-01-01	14417059172.3228990
1976-04-01	16412892614.7653000
1976-07-01	17528689603.3155980
1976-10-01	18951335510.9316980
1977-01-01	17838937833.8058000
1977-04-01	19726646192.1731000
1977-07-01	20618182420.1207000
1977-10-01	22823076868.4264030
1978-01-01	22025543126.9534000
1978-04-01	24040404867.7397000
1978-07-01	25683913278.2196000
1978-10-01	26569265937.1387000
1979-01-01	23147518880.1527980
1979-04-01	24682861367.5340000
1979-07-01	26439506653.6314000
1979-10-01	28097093587.5578000
1980-01-01	27159695287.4861030
1980-04-01	32091070323.9444000
1980-07-01	33573420712.8905030
1980-10-01	37584918332.6970000
1981-01-01	35453336175.8643000
1981-04-01	37863648736.2132000
1981-07-01	38348543013.7412000
1981-10-01	39832615452.2567000
1982-01-01	35042926219.0031000
1982-04-01	35410289656.9702000
1982-07-01	33827248172.4387000
1982-10-01	34057308597.7857970
1983-01-01	33175938883.8921000
1983-04-01	36146284266.0783000
1983-07-01	37042916546.8123000
1983-10-01	40656893059.9982000
1984-01-01	39124055495.0674060
1984-04-01	43214068086.0264000
1984-07-01	42473211749.1010000
1984-10-01	44790849753.3045960
1985-01-01	38419548799.9146040
1985-04-01	43956880462.2506000
1985-07-01	44367566199.6005000
1985-10-01	50360587882.8575000
1986-01-01	46179144621.5664000
1986-04-01	53612914872.0405960
1986-07-01	55390075388.4876000
1986-10-01	55295737831.3293000
1987-01-01	51967096398.4783900
1987-04-01	57157372879.0402000
1987-07-01	57892987248.6042000
1987-10-01	64063809501.2936000
1988-01-01	60269676604.2831000
1988-04-01	64996402948.4536060
1988-07-01	66718821863.9153000
1988-10-01	72987683754.3056000
1989-01-01	67762457796.2149050
1989-04-01	66830574360.9916100
1989-07-01	69642732855.3961000
1989-10-01	69758176247.9650000
1990-01-01	66006220750.9347000
1990-04-01	67323894261.4678000
1990-07-01	73339267946.6277000
1990-10-01	80973408232.2072000
1991-01-01	76170338192.8207000
1991-04-01	73947377613.4800000
1991-07-01	79520991222.1294000
1991-10-01	85676679862.3742000
1992-01-01	81902822969.8044000
1992-04-01	81261589881.1554000
1992-07-01	87712659974.2209000
1992-10-01	88984389193.7737900
1993-01-01	87276067148.9178000
1993-04-01	89162850553.8486000
1993-07-01	93766591653.0988000
1993-10-01	91878901557.2774000
1994-01-01	92665360630.3302000
1994-04-01	95324780651.4799000
1994-07-01	102323064144.6470000
1994-10-01	106561377158.6490000
1995-01-01	106180393633.4160000
1995-04-01	116787435499.6760000
1995-07-01	109173336577.8760000
1995-10-01	110142728022.6690000
1996-01-01	101737038388.1290000
1996-04-01	99519494838.2031000
1996-07-01	102363076384.4190000
1996-10-01	107221417560.8779900
1997-01-01	99564325762.7677000
1997-04-01	105802382693.4060000
1997-07-01	107164418052.1859900
1997-10-01	108411901583.5100000
1998-01-01	97979529306.8808100
1998-04-01	93812862302.0678000
1998-07-01	94115854509.5217900
1998-10-01	101746907393.1980000
1999-01-01	97401083829.0926000
1999-04-01	96536557365.4388900
1999-07-01	107634558230.6160000
1999-10-01	117666658680.1819900
2000-01-01	115278780643.5910000
2000-04-01	119187195004.3779900
2000-07-01	122544963291.9070000
2000-10-01	121929941548.2880000
2001-01-01	107970823299.8390000
2001-04-01	100160361163.9880000
2001-07-01	98831621484.8880000
2001-10-01	96501615427.9037000
2002-01-01	93240344140.1779000
2002-04-01	102401061027.6320000
2002-07-01	108272350266.6810000
2002-10-01	113159939557.1410000
2003-01-01	109047341836.0390000
2003-04-01	112530072634.9900000
2003-07-01	117786522843.4060000
2003-10-01	132380267355.5370000
2004-01-01	135173992768.2720000
2004-04-01	137843282184.1160000
2004-07-01	141353470518.6710000
2004-10-01	151464434898.4199800
2005-01-01	143804472492.2400000
2005-04-01	146729137008.6900000
2005-07-01	149987082345.8860000
2005-10-01	154925567020.8760000
2006-01-01	151149022569.5110200
2006-04-01	158106236382.4790000
2006-07-01	165926774495.9790000
2006-10-01	171392236576.5010000
2007-01-01	166540279647.3420000
2007-04-01	169590303242.8680000
2007-07-01	181355085360.2949800
2007-10-01	196381288096.2590000
2008-01-01	200157583966.7540000
2008-04-01	199258875697.0170000
2008-07-01	204794722801.4500000
2008-10-01	177649971643.2060000
2009-01-01	119521996029.4659900
2009-04-01	131573901813.0370000
2009-07-01	154653959478.5960000
2009-10-01	174948434726.6179800
2010-01-01	176822862936.1460000
2010-04-01	185284451721.4430000
2010-07-01	198617569258.6220000
2010-10-01	209279666717.1020000
2011-01-01	199588239383.9490000
2011-04-01	192407537880.2330000
2011-07-01	220230165356.9199800
2011-10-01	211151475355.7530200
2012-01-01	203772144797.4700000
2012-04-01	205338456414.5610000
2012-07-01	199918258432.7180200
2012-10-01	189866523685.3790000
2013-01-01	177161313827.1290000
2013-04-01	178215604112.1360000
2013-07-01	179043106575.4640200
2013-10-01	180363206286.9149800
2014-01-01	169545315683.2450000
2014-04-01	172457173729.8630000
2014-07-01	175819769623.6670200
2014-10-01	172686272601.3740000
2015-01-01	159555631255.2980000
2015-04-01	154914355828.0680200
2015-07-01	155148208003.0739700
2015-10-01	155346450922.5670000
2016-01-01	151706992345.3809800
2016-04-01	157499133171.9860000
2016-07-01	166089813728.2630000
2016-10-01	169192279033.8340000
2017-01-01	167058231440.8790000
2017-04-01	169186463840.8840000
2017-07-01	176379716291.4000000
2017-10-01	185217069645.7190000
2018-01-01	183953040550.6030000
2018-04-01	185130854242.9470200