Quarter	US Dollars, monthly level
1960-01-01	529682021.37757605
1960-04-01	557305844.55143300
1960-07-01	614715064.90381100
1960-10-01	617270009.90816900
1961-01-01	621648039.17734200
1961-04-01	524634683.72917200
1961-07-01	459061392.63587900
1961-10-01	441172742.06456700
1962-01-01	503851927.76182497
1962-04-01	536764356.63261200
1962-07-01	601686108.66383990
1962-10-01	577343867.69326700
1963-01-01	579392491.25323000
1963-04-01	618347590.71761700
1963-07-01	627072536.58511500
1963-10-01	612379809.48202600
1964-01-01	646408006.65771700
1964-04-01	715188425.58107290
1964-07-01	755866609.94375800
1964-10-01	787927281.04099390
1965-01-01	777164220.55537010
1965-04-01	848800070.75270400
1965-07-01	875467125.74533900
1965-10-01	802770644.15251700
1966-01-01	799355458.22343500
1966-04-01	739456836.55705800
1966-07-01	849486912.50721300
1966-10-01	764898905.25533800
1967-01-01	830817348.51818800
1967-04-01	870459478.97874090
1967-07-01	897773996.57055800
1967-10-01	808739222.98630890
1968-01-01	929779133.62732100
1968-04-01	920423099.05363100
1968-07-01	986826928.59763400
1968-10-01	961429369.81547400
1969-01-01	884164605.26504210
1969-04-01	936625346.80673000
1969-07-01	1060600288.89999000
1969-10-01	1061164179.54737010
1970-01-01	1032018282.49190000
1970-04-01	1077980363.98415020
1970-07-01	1181634032.93794010
1970-10-01	1128103708.24679000
1971-01-01	1074260222.02756000
1971-04-01	1150628728.97657000
1971-07-01	1206861457.78592000
1971-10-01	1170580285.94771980
1972-01-01	1141335303.48211000
1972-04-01	1065706803.25137980
1972-07-01	1094440530.74345000
1972-10-01	1221523943.34309000
1973-01-01	1389287915.40495000
1973-04-01	1511784629.81111000
1973-07-01	1785369268.08576000
1973-10-01	2097066442.58089000
1974-01-01	2257769704.42993000
1974-04-01	2683189073.77998000
1974-07-01	3193217257.32150000
1974-10-01	2822337347.64646000
1975-01-01	2454524351.10575000
1975-04-01	2436111933.78464030
1975-07-01	2485692131.62110000
1975-10-01	2456186859.84912970
1976-01-01	2620524310.21604000
1976-04-01	2647056373.38629000
1976-07-01	3005562717.29234000
1976-10-01	2805173900.58367000
1977-01-01	3041378032.26060000
1977-04-01	3102866697.45176000
1977-07-01	3145548403.97163000
1977-10-01	2965360827.38302000
1978-01-01	3197583881.29532000
1978-04-01	3305157694.93527030
1978-07-01	3672351353.14519000
1978-10-01	3960844026.72431000
1979-01-01	3855573476.55864000
1979-04-01	4132522457.33183000
1979-07-01	4085178260.54346000
1979-10-01	4343230755.44146000
1980-01-01	4814983475.87533000
1980-04-01	4631285906.87945900
1980-07-01	5396472681.08671950
1980-10-01	5363052718.76013000
1981-01-01	5362722210.61672000
1981-04-01	5725245984.93447000
1981-07-01	6311580074.56260000
1981-10-01	6148466287.20279000
1982-01-01	6300397878.74849000
1982-04-01	6348885778.69890000
1982-07-01	5712564825.95853000
1982-10-01	5248257290.61991000
1983-01-01	4505780696.14921000
1983-04-01	3867922566.21640000
1983-07-01	5101786130.33043000
1983-10-01	5031669263.83879000
1984-01-01	5510144462.72252000
1984-04-01	5666873269.63738000
1984-07-01	5816208856.14459000
1984-10-01	5675129180.52973900
1985-01-01	5527704826.36814000
1985-04-01	5325010182.81034900
1985-07-01	6351969131.01983000
1985-10-01	5937530071.11158100
1986-01-01	5971485684.37876000
1986-04-01	6013913519.73016000
1986-07-01	5955754451.08688000
1986-10-01	5938154600.47551100
1987-01-01	6134576627.40543000
1987-04-01	6487952837.75181000
1987-07-01	7016889073.23466000
1987-10-01	7311907549.18740000
1988-01-01	7376755271.86521000
1988-04-01	7827104901.77668000
1988-07-01	8565770885.79405000
1988-10-01	9526548466.71173100
1989-01-01	10245726702.49100000
1989-04-01	9987909456.04251100
1989-07-01	10259578938.76090000
1989-10-01	10404923912.72930000
1990-01-01	9719917887.14124000
1990-04-01	9118046700.21699000
1990-07-01	9963001946.27843000
1990-10-01	10074008060.79690000
1991-01-01	9428084579.36641000
1991-04-01	8912446954.56171000
1991-07-01	9916241743.12875200
1991-10-01	10440374529.29010000
1992-01-01	9271783831.57561000
1992-04-01	9601880497.34705000
1992-07-01	10990457979.95220000
1992-10-01	10805464847.80190000
1993-01-01	9805380121.96561000
1993-04-01	10268337507.81790000
1993-07-01	10959639089.49840200
1993-10-01	11294413605.28880000
1994-01-01	10692842938.07199900
1994-04-01	11596037899.45640000
1994-07-01	13582060544.66210000
1994-10-01	13994058667.99829900
1995-01-01	13773133643.88840000
1995-04-01	13975250382.35430000
1995-07-01	14819310223.40790000
1995-10-01	14842923845.92250000
1996-01-01	14383610134.84020000
1996-04-01	15012410367.17950000
1996-07-01	15691537189.31350000
1996-10-01	16368089248.80010000
1997-01-01	14380723169.26060000
1997-04-01	15432316144.91280000
1997-07-01	16038480531.29060000
1997-10-01	15939782504.61970000
1998-01-01	14831040107.47600000
1998-04-01	14803515491.61950000
1998-07-01	15300500960.29930000
1998-10-01	15810094792.27520000
1999-01-01	14630579840.17510000
1999-04-01	15412962285.98350000
1999-07-01	16926713621.73400000
1999-10-01	18554636317.86590000
2000-01-01	16657511200.26000000
2000-04-01	16972463983.17280200
2000-07-01	17383804405.07660000
2000-10-01	16718503549.33319900
2001-01-01	14581365405.28200000
2001-04-01	14902459182.36920000
2001-07-01	15393827046.04790000
2001-10-01	15939140056.34000000
2002-01-01	14806166314.42220000
2002-04-01	16481699370.89420100
2002-07-01	18336266466.23100000
2002-10-01	19894165566.87060000
2003-01-01	18923219449.87590000
2003-04-01	20493403620.28910000
2003-07-01	21670058321.07520000
2003-10-01	23699284969.06110000
2004-01-01	23586576555.79089700
2004-04-01	24409912439.01560000
2004-07-01	26800496541.94009800
2004-10-01	29127288945.65810000
2005-01-01	27176533329.77570000
2005-04-01	29325945126.34100000
2005-07-01	30661276781.74030000
2005-10-01	31276319271.93770200
2006-01-01	29856021893.43790000
2006-04-01	33226322821.29090000
2006-07-01	33636119051.62270000
2006-10-01	35964108764.35229500
2007-01-01	34567253280.42320000
2007-04-01	37933003288.40390000
2007-07-01	40378337279.67080000
2007-10-01	44893402584.35540000
2008-01-01	45433939436.02310000
2008-04-01	50839776840.11970000
2008-07-01	52115946825.69020000
2008-10-01	42097144141.46330000
2009-01-01	33775774281.69050200
2009-04-01	35402820584.22420500
2009-07-01	41474666364.24830000
2009-10-01	48271299137.56770000
2010-01-01	43955183532.29790500
2010-04-01	46172857121.05720000
2010-07-01	49271731090.59520000
2010-10-01	54229266393.56850400
2011-01-01	50982175557.35390000
2011-04-01	57019817665.52080000
2011-07-01	63279758751.56050000
2011-10-01	62977726352.32860600
2012-01-01	60979775287.74180000
2012-04-01	59983440448.94511000
2012-07-01	63739312602.96330000
2012-10-01	65724235196.23579400
2013-01-01	56924414769.05580000
2013-04-01	56358090306.64860000
2013-07-01	59400940574.57100000
2013-10-01	59618296809.04090000
2014-01-01	55198738565.55640000
2014-04-01	57469594760.43630000
2014-07-01	59809087746.78810000
2014-10-01	55540501631.58340500
2015-01-01	48586204405.35410000
2015-04-01	51053160016.32120000
2015-07-01	50768097302.99260000
2015-10-01	50203705028.43830000
2016-01-01	44037205542.27320000
2016-04-01	46568153818.56620000
2016-07-01	49390572695.84589400
2016-10-01	49217847071.74590000
2017-01-01	48092142648.68060000
2017-04-01	52371290742.85630000
2017-07-01	64936794099.40980000
2017-10-01	55955447229.41009500
2018-01-01	55677379620.78100000
2018-04-01	56936567723.86059600
2018-07-01	56214442474.41810000