Quarter	US Dollars, monthly level
1960-01-01	497423314.7715480
1960-04-01	560828459.8135810
1960-07-01	562787100.7651060
1960-10-01	612959895.9861921
1961-01-01	643989125.9017240
1961-04-01	664973602.0650170
1961-07-01	664689802.1589969
1961-10-01	722104353.5964130
1962-01-01	755671929.1489840
1962-04-01	744532627.1866039
1962-07-01	741778713.7532669
1962-10-01	760948271.2035561
1963-01-01	741066062.5960550
1963-04-01	826176073.9755199
1963-07-01	818196553.0279230
1963-10-01	852065522.1146320
1964-01-01	868402180.7016560
1964-04-01	920199501.2465660
1964-07-01	882019394.7052491
1964-10-01	927742852.2884281
1965-01-01	887318740.1873720
1965-04-01	913520153.5502510
1965-07-01	910338920.2708831
1965-10-01	969336564.5849410
1966-01-01	942071341.7737940
1966-04-01	976136468.8461820
1966-07-01	980867514.0884941
1966-10-01	1031408167.5102200
1967-01-01	1002184564.9727199
1967-04-01	1056757403.3920499
1967-07-01	1004437505.7689601
1967-10-01	1046017658.2084600
1968-01-01	1062738956.1934000
1968-04-01	1079948181.7342300
1968-07-01	1130977195.4159700
1968-10-01	1227560325.0416600
1969-01-01	1163647604.3274600
1969-04-01	1286891252.8645399
1969-07-01	1322882386.1931300
1969-10-01	1497588946.2467700
1970-01-01	1504920848.6161401
1970-04-01	1659880572.9996500
1970-07-01	1570688413.3719702
1970-10-01	1730327717.0889000
1971-01-01	1673938482.7594800
1971-04-01	1799827458.1225700
1971-07-01	1789626288.6583300
1971-10-01	1950948966.6790001
1972-01-01	2009896551.7256500
1972-04-01	2110557337.2606800
1972-07-01	2076727561.5584300
1972-10-01	2281008536.4785404
1973-01-01	2549768571.1287203
1973-04-01	2796029862.9627100
1973-07-01	3011875778.9349504
1973-10-01	3231119684.4510800
1974-01-01	3375278147.3145400
1974-04-01	3733751734.9121500
1974-07-01	3545260630.6925300
1974-10-01	3789783601.4808600
1975-01-01	3624906911.2250600
1975-04-01	3469680447.8529700
1975-07-01	3011409857.2651196
1975-10-01	3193692697.7745900
1976-01-01	3354850606.1956800
1976-04-01	3564626602.4857000
1976-07-01	3682132718.8481503
1976-10-01	4169903137.4899607
1977-01-01	4147759193.5255100
1977-04-01	4316209469.6867800
1977-07-01	4463694949.6734600
1977-10-01	5047853354.6048300
1978-01-01	5447553286.0963600
1978-04-01	5830598763.6657910
1978-07-01	5892180173.7038900
1978-10-01	6585652492.5576910
1979-01-01	6698923203.8525800
1979-04-01	6829817001.2494700
1979-07-01	7416918174.5329090
1979-10-01	8399616119.0670800
1980-01-01	8816272934.9670700
1980-04-01	8728526311.9903010
1980-07-01	8815475950.8147890
1980-10-01	8824182373.0442000
1981-01-01	7677762717.4938500
1981-04-01	7413913991.3452500
1981-07-01	7242481849.2679500
1981-10-01	8308421996.2348600
1982-01-01	7531010495.7802000
1982-04-01	7370113111.2121700
1982-07-01	6596721076.4323010
1982-10-01	7162853294.6477190
1983-01-01	7439945336.4315405
1983-04-01	7446341733.2482400
1983-07-01	6776809285.9310490
1983-10-01	7438889207.6165500
1984-01-01	7884615873.7092705
1984-04-01	7491278726.6713200
1984-07-01	6875013281.0003400
1984-10-01	7195330393.5385400
1985-01-01	6684830205.4366400
1985-04-01	7438981342.8251500
1985-07-01	7688428964.3633900
1985-10-01	8906483433.6862100
1986-01-01	9276542870.0964800
1986-04-01	10304419197.4798010
1986-07-01	10567515337.0381010
1986-10-01	10905356058.7624000
1987-01-01	11628885022.6001000
1987-04-01	12592203844.6110000
1987-07-01	11982186164.8823000
1987-10-01	14375327504.0769000
1988-01-01	14026870868.1890010
1988-04-01	14590877934.8254000
1988-07-01	13009316354.3740000
1988-10-01	14761191329.0996000
1989-01-01	14106053045.7267990
1989-04-01	14795025801.9482000
1989-07-01	13714605151.0887000
1989-10-01	15622238443.7618000
1990-01-01	15609894539.0390010
1990-04-01	15908148307.6241000
1990-07-01	15907640004.6116000
1990-10-01	17414758972.3026000
1991-01-01	16614978225.4898000
1991-04-01	15461599291.8665000
1991-07-01	14191738767.2498000
1991-10-01	15761921957.8900000
1992-01-01	15530167961.1094000
1992-04-01	15239743514.0564000
1992-07-01	15849901260.8462000
1992-10-01	15116023952.8304000
1993-01-01	13674011559.1940000
1993-04-01	14558223792.7301000
1993-07-01	13760388717.8828000
1993-10-01	14725685794.6811000
1994-01-01	14470667090.9682000
1994-04-01	15655661038.3678000
1994-07-01	16171392078.4711000
1994-10-01	17748448541.0494000
1995-01-01	18444553434.6267000
1995-04-01	19958106620.6769030
1995-07-01	18331305565.1569980
1995-10-01	20139884556.8714030
1996-01-01	19575228555.4179000
1996-04-01	18465081058.8497000
1996-07-01	18107077306.5518000
1996-10-01	18295710084.2832000
1997-01-01	17402157045.3999000
1997-04-01	18048501693.6177000
1997-07-01	17197170193.7238000
1997-10-01	18464819193.7466000
1998-01-01	17868754979.8817000
1998-04-01	18143470589.8291000
1998-07-01	17668957967.8006020
1998-10-01	20172315780.3279000
1999-01-01	19110549363.6181030
1999-04-01	18183935428.8276980
1999-07-01	18459970867.2741000
1999-10-01	19720158710.0598000
2000-01-01	19178592151.6039000
2000-04-01	18808987973.7488000
2000-07-01	18412126146.3565980
2000-10-01	19782895993.6156000
2001-01-01	20477752936.1731000
2001-04-01	19173805273.0039000
2001-07-01	18491710676.9921000
2001-10-01	18964883776.8076000
2002-01-01	19302548497.5083000
2002-04-01	21075148919.2120000
2002-07-01	20731691380.3390000
2002-10-01	21389334266.8556000
2003-01-01	23916837303.7271000
2003-04-01	23175366193.4443000
2003-07-01	22832365105.3080000
2003-10-01	25768485092.4245000
2004-01-01	26888233429.4076000
2004-04-01	26586977396.0132000
2004-07-01	27055295117.2174000
2004-10-01	29847106043.1654000
2005-01-01	30015638572.0453000
2005-04-01	30266955859.6432000
2005-07-01	29004003068.8586000
2005-10-01	30387726154.6298980
2006-01-01	31423966402.6498000
2006-04-01	32903061565.6229000
2006-07-01	31876717284.2362000
2006-10-01	35866594376.2374040
2007-01-01	36485291293.9761000
2007-04-01	37508200555.6728000
2007-07-01	37289764056.0308000
2007-10-01	41943963697.9971000
2008-01-01	43308216328.6755000
2008-04-01	47531793135.8800000
2008-07-01	43676443369.6837000
2008-10-01	38489405676.6084000
2009-01-01	35902301714.7623000
2009-04-01	34781812339.4045000
2009-07-01	36696775623.3964000
2009-10-01	40420790323.3361000
2010-01-01	39670819936.3684000
2010-04-01	40057921037.7795000
2010-07-01	41408876099.9119000
2010-10-01	46148627854.2834900
2011-01-01	47587755327.2081000
2011-04-01	50461279587.3903050
2011-07-01	50871867704.8807000
2011-10-01	47911868748.3545000
2012-01-01	48545151466.8783000
2012-04-01	46684196191.3977050
2012-07-01	45220661049.6928000
2012-10-01	48202823612.3786000
2013-01-01	46684728847.8176040
2013-04-01	47396932073.4416960
2013-07-01	46388813246.9454040
2013-10-01	51264545761.0240000
2014-01-01	49688673307.8880000
2014-04-01	50223130663.9843000
2014-07-01	48415041790.2248000
2014-10-01	46948164543.5125960
2015-01-01	44700037750.9111000
2015-04-01	42701498838.3939060
2015-07-01	41381628840.7446000
2015-10-01	44101714310.3321000
2016-01-01	42501487776.7242000
2016-04-01	45614936047.2013900
2016-07-01	43646744394.0534000
2016-10-01	44426762829.0369000
2017-01-01	44032286947.1397000
2017-04-01	47197185356.0317000
2017-07-01	46849578125.4423000
2017-10-01	50619664562.9133000
2018-01-01	53581003627.7667000
2018-04-01	53221655319.6301040
2018-07-01	48974684734.3442000