Quarter	US Dollars, monthly level
1960-01-01	331291876.43146604
1960-04-01	343600056.91530600
1960-07-01	354431005.22736800
1960-10-01	386536892.96571803
1961-01-01	377655254.50575400
1961-04-01	354952705.74091800
1961-07-01	368372352.41903096
1961-10-01	384703518.58175800
1962-01-01	376446102.97821600
1962-04-01	374069785.23721904
1962-07-01	384444669.81168604
1962-10-01	425879103.01137197
1963-01-01	405830028.70328500
1963-04-01	423096021.74095300
1963-07-01	413092925.47748400
1963-10-01	443178851.47261300
1964-01-01	436340670.06673300
1964-04-01	462338797.14578300
1964-07-01	458432790.47078300
1964-10-01	517144849.10365200
1965-01-01	474576940.36867000
1965-04-01	511130080.49284005
1965-07-01	532678775.71251600
1965-10-01	595368976.22926400
1966-01-01	569377044.19387400
1966-04-01	588003241.40732300
1966-07-01	577000445.31795410
1966-10-01	606860137.35343000
1967-01-01	569306975.31946100
1967-04-01	582443772.32280990
1967-07-01	550258195.88553700
1967-10-01	620989687.63296810
1968-01-01	617933350.49494800
1968-04-01	596635347.30242600
1968-07-01	631285769.88574800
1968-10-01	663999477.48742210
1969-01-01	644791610.03296800
1969-04-01	695734509.22284790
1969-07-01	718233510.30190600
1969-10-01	780661936.20180900
1970-01-01	797867207.29508790
1970-04-01	882447897.61358500
1970-07-01	900563713.46898400
1970-10-01	986080841.20573500
1971-01-01	956345425.20452200
1971-04-01	1042343204.39569000
1971-07-01	1054239845.06469990
1971-10-01	1147624926.09738020
1972-01-01	1162872548.04214000
1972-04-01	1257937487.47652980
1972-07-01	1206268074.20408000
1972-10-01	1588460728.21789000
1973-01-01	1463075121.73938010
1973-04-01	1709878791.64870000
1973-07-01	1929015400.06671000
1973-10-01	1995844372.60239000
1974-01-01	2092908359.20687990
1974-04-01	2291948070.05988030
1974-07-01	2285392378.76722000
1974-10-01	2348013659.79706000
1975-01-01	2427443382.81944000
1975-04-01	2423347924.41180000
1975-07-01	2158064168.85928000
1975-10-01	2380798060.58385000
1976-01-01	2550139294.35484030
1976-04-01	2720642018.12396000
1976-07-01	2890168751.79555000
1976-10-01	3360371588.44470000
1977-01-01	3246468183.86968000
1977-04-01	3320585146.60993000
1977-07-01	3620443381.77752970
1977-10-01	4057596026.72923000
1978-01-01	3641207413.29699000
1978-04-01	3882135506.58508000
1978-07-01	3903050240.56564000
1978-10-01	4577267475.40506000
1979-01-01	4428103107.37361000
1979-04-01	4686499106.38888100
1979-07-01	5172565530.46603000
1979-10-01	5971237032.71243000
1980-01-01	6035140902.75048000
1980-04-01	6152089019.64932000
1980-07-01	6224401591.76991900
1980-10-01	6003056510.51800100
1981-01-01	5383390255.79933000
1981-04-01	5186664425.02936000
1981-07-01	5062914780.38674100
1981-10-01	5400113919.58618000
1982-01-01	4976891326.15370000
1982-04-01	5074914944.29618000
1982-07-01	4801687340.91543000
1982-10-01	4656336609.65560100
1983-01-01	4712157733.84589000
1983-04-01	4794400647.38867000
1983-07-01	4686750768.59219900
1983-10-01	5173491653.72032900
1984-01-01	4798047970.10964000
1984-04-01	5122798644.41068900
1984-07-01	4793156585.94567000
1984-10-01	4893016271.98246000
1985-01-01	4498463041.98087000
1985-04-01	5130738767.64778000
1985-07-01	5441666960.15780000
1985-10-01	5939310157.60587000
1986-01-01	6013377050.49403000
1986-04-01	6618138668.75244000
1986-07-01	6998423024.23872000
1986-10-01	7195822413.26464000
1987-01-01	7389839072.19524000
1987-04-01	8037266300.64666000
1987-07-01	7947363668.32112000
1987-10-01	9279382675.97310000
1988-01-01	8876407191.33820200
1988-04-01	9378199277.68285000
1988-07-01	8703045100.37713000
1988-10-01	9628821388.16403000
1989-01-01	9696425462.19952000
1989-04-01	9647683963.04289000
1989-07-01	9129385445.87798100
1989-10-01	10469636810.53209900
1990-01-01	11635169727.10240200
1990-04-01	11385600210.66150000
1990-07-01	12144937666.63790000
1990-10-01	13940719563.17820000
1991-01-01	12937680603.50340000
1991-04-01	12699966170.50070000
1991-07-01	11758571588.74310100
1991-10-01	13404289092.87690000
1992-01-01	12762539222.78539800
1992-04-01	13180610391.18319900
1992-07-01	14082188669.16090000
1992-10-01	14092149108.04440000
1993-01-01	11768385167.46410000
1993-04-01	12534100342.53480000
1993-07-01	11783814961.54740000
1993-10-01	12479121134.61990000
1994-01-01	12217931164.90170000
1994-04-01	13339847765.52750000
1994-07-01	13592849693.37950100
1994-10-01	16134108658.02690000
1995-01-01	16667312519.26550100
1995-04-01	18039929015.08430000
1995-07-01	16642261986.06750000
1995-10-01	17801025312.39990200
1996-01-01	17645027992.53530000
1996-04-01	16906459083.89090200
1996-07-01	17167624771.36139900
1996-10-01	18449789101.44429800
1997-01-01	16220103031.97140100
1997-04-01	16263872513.59680200
1997-07-01	15828642563.32540100
1997-10-01	17091489677.70680000
1998-01-01	16503657749.40830000
1998-04-01	16579527272.72730000
1998-07-01	16986760844.64330000
1998-10-01	18997686183.77190000
1999-01-01	17797533150.37920000
1999-04-01	17090187064.66260100
1999-07-01	17659881038.67420200
1999-10-01	18733400248.04630300
2000-01-01	18175635933.25900000
2000-04-01	17803986227.96460000
2000-07-01	17497299634.98790000
2000-10-01	18733979735.89380000
2001-01-01	19830322849.60730000
2001-04-01	18338173614.95830000
2001-07-01	17627516241.08139800
2001-10-01	18879928732.43090000
2002-01-01	17728601047.60190000
2002-04-01	19120533770.84250000
2002-07-01	19980971450.16080000
2002-10-01	21486029031.53800000
2003-01-01	23708661015.91740000
2003-04-01	24096576011.95139700
2003-07-01	24167968831.29600000
2003-10-01	27628340698.97650000
2004-01-01	28686063065.33030000
2004-04-01	28521910630.47350000
2004-07-01	29040908176.48120000
2004-10-01	33721524092.94370300
2005-01-01	30896426633.42680000
2005-04-01	32191955096.39109800
2005-07-01	31165320966.65709700
2005-10-01	32865211249.41400000
2006-01-01	31508099538.82140000
2006-04-01	34083454529.49460200
2006-07-01	34643533264.47010000
2006-10-01	37133885425.73360400
2007-01-01	37973832656.26820000
2007-04-01	39141195404.95550500
2007-07-01	40812767375.35419500
2007-10-01	45326219862.85219600
2008-01-01	46285021555.58800500
2008-04-01	50842960221.10680400
2008-07-01	46863122239.66270400
2008-10-01	40198094469.46930000
2009-01-01	32526349405.35679600
2009-04-01	33875616443.47080000
2009-07-01	36577365381.86090000
2009-10-01	40051907167.33100000
2010-01-01	36984254692.45750000
2010-04-01	37933930354.27949500
2010-07-01	39778731153.31900000
2010-10-01	44225706647.11460000
2011-01-01	45960788840.98670000
2011-04-01	48982737156.92080000
2011-07-01	49081145649.61069500
2011-10-01	47295377382.97639500
2012-01-01	45619263547.22449500
2012-04-01	44207968554.47210000
2012-07-01	43436913394.60760000
2012-10-01	45383801922.88100000
2013-01-01	44179717272.08080000
2013-04-01	44481259159.94890000
2013-07-01	46329034127.41170500
2013-10-01	48296125012.42540000
2014-01-01	47408758824.39400000
2014-04-01	46802946601.38320000
2014-07-01	44736555667.19770000
2014-10-01	43080428130.33960000
2015-01-01	39224358004.10610000
2015-04-01	37819090283.39700000
2015-07-01	39514840317.56631000
2015-10-01	39523079994.40670000
2016-01-01	38875351157.83400000
2016-04-01	39936354829.63800000
2016-07-01	39124374166.61320000
2016-10-01	39664083474.40460000
2017-01-01	41661471128.17869600
2017-04-01	41916238809.66180000
2017-07-01	44941765327.45690000
2017-10-01	47218100915.48080000
2018-01-01	49850157884.38300000
2018-04-01	48735748825.15009000