Quarter	US Dollars, monthly level
1960-01-01	359143830.90961300
1960-04-01	371750458.27353200
1960-07-01	358962449.74175500
1960-10-01	406676913.14733400
1961-01-01	366516620.16291000
1961-04-01	362584552.70833100
1961-07-01	376275477.29026200
1961-10-01	432054400.53031504
1962-01-01	399812473.09237900
1962-04-01	406158085.27111100
1962-07-01	397689098.90107100
1962-10-01	466514853.26734500
1963-01-01	438217537.14855796
1963-04-01	484994564.78883800
1963-07-01	463690801.26286700
1963-10-01	521867657.42097795
1964-01-01	490275921.82609200
1964-04-01	486742667.01651496
1964-07-01	514778090.32115300
1964-10-01	612232238.36965400
1965-01-01	543432320.71427200
1965-04-01	574479579.42452600
1965-07-01	552404738.34739300
1965-10-01	646970764.96065800
1966-01-01	598750976.79828400
1966-04-01	624428582.40171490
1966-07-01	573848388.22065200
1966-10-01	656046318.53398000
1967-01-01	599627224.28519090
1967-04-01	639913677.63786100
1967-07-01	609870583.18275000
1967-10-01	677096405.35747990
1968-01-01	643323971.73155700
1968-04-01	640706500.97116800
1968-07-01	653830652.76527800
1968-10-01	707326925.96475900
1969-01-01	714815580.89517510
1969-04-01	757576220.61577200
1969-07-01	713346875.72949290
1969-10-01	825448961.79813100
1970-01-01	767510078.27486190
1970-04-01	846715468.13898800
1970-07-01	819929640.84170900
1970-10-01	922188612.15438200
1971-01-01	829443073.56237600
1971-04-01	936383990.78905700
1971-07-01	897559632.78009590
1971-10-01	1026934001.29750990
1972-01-01	1038259017.39208010
1972-04-01	1128057393.23203000
1972-07-01	1017477668.78240010
1972-10-01	1232615719.97050000
1973-01-01	1321324667.65241000
1973-04-01	1465782690.84105010
1973-07-01	1658858557.89056000
1973-10-01	1818830027.71778000
1974-01-01	1759236048.77449000
1974-04-01	1945216907.73192000
1974-07-01	1859063095.92276000
1974-10-01	2167089296.93833000
1975-01-01	2137251571.64565000
1975-04-01	2330707195.48326970
1975-07-01	1924494278.26445000
1975-10-01	2327557309.23380000
1976-01-01	2143732484.05533000
1976-04-01	2306318312.08189000
1976-07-01	2157591672.15618000
1976-10-01	2508667017.29330970
1977-01-01	2544240161.89872030
1977-04-01	2442755854.24424000
1977-07-01	2335079215.62822960
1977-10-01	2746908673.89508960
1978-01-01	2679015658.88211000
1978-04-01	2969880571.08562000
1978-07-01	2766369784.48559000
1978-10-01	3372611300.25602960
1979-01-01	3446481390.58360960
1979-04-01	3555191081.80783000
1979-07-01	3567109658.64005000
1979-10-01	4130473485.26905000
1980-01-01	4335167590.58790000
1980-04-01	4146475427.44511030
1980-07-01	4025052845.06803040
1980-10-01	4285264669.29715970
1981-01-01	4229455038.77434970
1981-04-01	4024778443.52752000
1981-07-01	3621626764.89942000
1981-10-01	4187067867.26683000
1982-01-01	4007305645.60744000
1982-04-01	3869935709.34316000
1982-07-01	3452734511.45197960
1982-10-01	3822116123.65482000
1983-01-01	4180314377.95218000
1983-04-01	4016596452.70865000
1983-07-01	3675961847.97912000
1983-10-01	4185323274.05799960
1984-01-01	4121048801.66908000
1984-04-01	4058860992.55033000
1984-07-01	3723065502.53069970
1984-10-01	4080577965.46417000
1985-01-01	3789079846.59845970
1985-04-01	4045007933.35926000
1985-07-01	4234212181.12290000
1985-10-01	5024932773.00658000
1986-01-01	4947267580.48200000
1986-04-01	5438827513.54997100
1986-07-01	5072060508.83464000
1986-10-01	5817403673.49328000
1987-01-01	6138763120.16317000
1987-04-01	6336374161.28496000
1987-07-01	6012815582.86382000
1987-10-01	7205822547.30295900
1988-01-01	7362626009.48436000
1988-04-01	7155454374.55898000
1988-07-01	6350309347.53466000
1988-10-01	7691283608.59144000
1989-01-01	6935953667.08886050
1989-04-01	7402721143.36908000
1989-07-01	6955013538.61276000
1989-10-01	8299088986.21254100
1990-01-01	8521728153.73866100
1990-04-01	8845694747.83599000
1990-07-01	8931525993.28118100
1990-10-01	10750619029.52940000
1991-01-01	9601394626.37295200
1991-04-01	9290467343.51159900
1991-07-01	8908766977.12280800
1991-10-01	10107876740.99220000
1992-01-01	10028074014.13860000
1992-04-01	10140811497.27999900
1992-07-01	10757946875.31840000
1992-10-01	10732162544.27200100
1993-01-01	9520666693.08619000
1993-04-01	9591940034.04966000
1993-07-01	9067084563.88506100
1993-10-01	10036661085.91890000
1994-01-01	9686042776.37270000
1994-04-01	10309982228.69049800
1994-07-01	10930702687.59900000
1994-10-01	12194766015.30029900
1995-01-01	12631517890.80080000
1995-04-01	13043467220.35669900
1995-07-01	12411589510.99910000
1995-10-01	13378228342.92900000
1996-01-01	12682945849.91270000
1996-04-01	12524131961.34220000
1996-07-01	12665196803.88700000
1996-10-01	13606547899.48380000
1997-01-01	11945469663.98330000
1997-04-01	12501673790.72120000
1997-07-01	11723313843.85180000
1997-10-01	12951064340.92040000
1998-01-01	11983207152.20140000
1998-04-01	11324201431.26820000
1998-07-01	12379200482.59220000
1998-10-01	13163831289.72860000
1999-01-01	12382671363.94440000
1999-04-01	11973716941.12420000
1999-07-01	12213404734.31480000
1999-10-01	13801576411.47060000
2000-01-01	12375266425.35620000
2000-04-01	12107446433.49010000
2000-07-01	12646155480.63210000
2000-10-01	13220644291.04160000
2001-01-01	13132040412.23280100
2001-04-01	12184273036.79970000
2001-07-01	12566618623.88600200
2001-10-01	13199615210.32560000
2002-01-01	12441299116.25180000
2002-04-01	14021403022.70300000
2002-07-01	14341645531.84630000
2002-10-01	15581176233.93890000
2003-01-01	15650999631.27470000
2003-04-01	16150335510.72210100
2003-07-01	15929037767.76190000
2003-10-01	17645624658.64489700
2004-01-01	18151948080.91969700
2004-04-01	18189830974.74939700
2004-07-01	18404366795.85780000
2004-10-01	20918473160.67390000
2005-01-01	19850349649.92189800
2005-04-01	20840815646.40210000
2005-07-01	20452310827.31160000
2005-10-01	21143598908.08320000
2006-01-01	21259565877.32130000
2006-04-01	22452777454.10680000
2006-07-01	22667371080.85090000
2006-10-01	24580757113.03250000
2007-01-01	23969313572.46830000
2007-04-01	24274627009.60240000
2007-07-01	25249112729.79900000
2007-10-01	28468002077.83650000
2008-01-01	29224608430.20340000
2008-04-01	32450877409.46850000
2008-07-01	30343183321.51900000
2008-10-01	24276181169.16820000
2009-01-01	20955771572.08540000
2009-04-01	21851435379.39309700
2009-07-01	23962332092.52880000
2009-10-01	25366201365.31570000
2010-01-01	23459338877.54900000
2010-04-01	22748874673.87669800
2010-07-01	24320536894.25360000
2010-10-01	25728882831.97740000
2011-01-01	27591725029.43449800
2011-04-01	28975128992.59640000
2011-07-01	28728736879.40180200
2011-10-01	27653254522.90020000
2012-01-01	26623244749.83460200
2012-04-01	26598356653.89640000
2012-07-01	26009760777.21850000
2012-10-01	26915969175.27920000
2013-01-01	26300291622.09550000
2013-04-01	27241160210.58670000
2013-07-01	28205571456.63760000
2013-10-01	28696353065.53950000
2014-01-01	28022872446.57140400
2014-04-01	28454330166.38850000
2014-07-01	28013780234.28440000
2014-10-01	26124440376.92479700
2015-01-01	24639723237.48630000
2015-04-01	23747266912.52649700
2015-07-01	23381876923.00970000
2015-10-01	22834274410.21420000
2016-01-01	22437896801.42900000
2016-04-01	24721555021.54890000
2016-07-01	23957132598.71040000
2016-10-01	23629636786.25790000
2017-01-01	24257349435.37759800
2017-04-01	24552023248.45330000
2017-07-01	26296262610.33880000
2017-10-01	26349282947.25650000
2018-01-01	27428779694.11269800
2018-04-01	27285909240.88930000
2018-07-01	26213678885.54480400