Quarter	US Dollars, monthly level
1960-01-01	159779533.29655500
1960-04-01	156856812.66920600
1960-07-01	146709532.15121100
1960-10-01	172027922.87874300
1961-01-01	184876722.55909398
1961-04-01	188593233.46349698
1961-07-01	174216692.02783698
1961-10-01	185124562.50477300
1962-01-01	189079011.90346500
1962-04-01	189493931.78715000
1962-07-01	181129241.38938898
1962-10-01	207916183.24075100
1963-01-01	194516202.26201100
1963-04-01	223172093.51740798
1963-07-01	195684422.92120300
1963-10-01	243935270.90058400
1964-01-01	245364754.08335400
1964-04-01	252882644.00197202
1964-07-01	227674892.94595800
1964-10-01	244628773.37193600
1965-01-01	260862753.64544198
1965-04-01	277013846.90306000
1965-07-01	248282493.56149000
1965-10-01	255071801.98729602
1966-01-01	253111911.89693600
1966-04-01	239832053.46225500
1966-07-01	270529755.06729700
1966-10-01	278816243.44548400
1967-01-01	280499244.02265000
1967-04-01	275383583.99999700
1967-07-01	258772732.86149100
1967-10-01	259030413.84217602
1968-01-01	291610253.15363600
1968-04-01	312647221.78631700
1968-07-01	292476062.32729400
1968-10-01	335316644.41642400
1969-01-01	335066833.79042600
1969-04-01	397903715.10000800
1969-07-01	347274745.99865896
1969-10-01	386215904.62199104
1970-01-01	380060209.94510800
1970-04-01	415068386.61465000
1970-07-01	381817252.81203100
1970-10-01	441721857.49311197
1971-01-01	494932103.23697800
1971-04-01	462949758.15615600
1971-07-01	419994925.63142800
1971-10-01	464419233.75815700
1972-01-01	506496767.19779000
1972-04-01	537795971.59629800
1972-07-01	468244276.13791096
1972-10-01	592715348.17195200
1973-01-01	649977607.82005800
1973-04-01	713251872.37396110
1973-07-01	679645428.62825700
1973-10-01	749423837.05272290
1974-01-01	855609625.32796110
1974-04-01	1073957759.49518000
1974-07-01	964688412.43603800
1974-10-01	918641869.48232500
1975-01-01	989458877.50679600
1975-04-01	974986288.14623400
1975-07-01	839149375.64800100
1975-10-01	969336765.97358200
1976-01-01	1054927526.70638000
1976-04-01	1046829005.69516990
1976-07-01	989792519.03160800
1976-10-01	1100865317.69995020
1977-01-01	1310958475.30722000
1977-04-01	1329392555.46681000
1977-07-01	1315091587.82179000
1977-10-01	1440734576.36494000
1978-01-01	1626023234.87514000
1978-04-01	1803351855.19589000
1978-07-01	1776511164.05149980
1978-10-01	1912755109.53634000
1979-01-01	2231399302.08553030
1979-04-01	2519308951.81366000
1979-07-01	2522631192.04514000
1979-10-01	2587362321.91064020
1980-01-01	2989222296.69160000
1980-04-01	2718682392.57896000
1980-07-01	2751270175.20112040
1980-10-01	2692097020.28658000
1981-01-01	2724568650.81816000
1981-04-01	2687079071.99735980
1981-07-01	2583082128.53901000
1981-10-01	2606011118.00174000
1982-01-01	2689389226.33519000
1982-04-01	2570665262.53263000
1982-07-01	2215477986.47452000
1982-10-01	2228983609.46585040
1983-01-01	2404124099.37497000
1983-04-01	2259914662.38102960
1983-07-01	2153886016.89407000
1983-10-01	2340403373.16667000
1984-01-01	2549632613.29060000
1984-04-01	2424183715.61847000
1984-07-01	2251046632.68236000
1984-10-01	2447532115.12952000
1985-01-01	2356675365.93236970
1985-04-01	2454467121.59670000
1985-07-01	2428005773.60443000
1985-10-01	2776132599.23423000
1986-01-01	2836041412.71709000
1986-04-01	2932613783.16144000
1986-07-01	2719492547.77316000
1986-10-01	3072675499.42126040
1987-01-01	3223883374.89128000
1987-04-01	3393304339.20233000
1987-07-01	3204658080.04011000
1987-10-01	3828463198.72489000
1988-01-01	3822269040.60927960
1988-04-01	3815405529.28944000
1988-07-01	3574682464.83440000
1988-10-01	4343238037.99281000
1989-01-01	4342966171.04576000
1989-04-01	4323927844.01528000
1989-07-01	4054432491.36880000
1989-10-01	4700215945.87702000
1990-01-01	4913063944.85814000
1990-04-01	5021944195.98920100
1990-07-01	5034673592.11324000
1990-10-01	5719159721.50894000
1991-01-01	5602593189.89600000
1991-04-01	4950684064.06977900
1991-07-01	4763239761.98303000
1991-10-01	5422078384.03992000
1992-01-01	5470124489.75183000
1992-04-01	5511439401.07932000
1992-07-01	5765100797.90575000
1992-10-01	5727731737.43528000
1993-01-01	5544134365.51026000
1993-04-01	5286697184.10305000
1993-07-01	5261942148.39814000
1993-10-01	5683556611.40406000
1994-01-01	6073681220.02556000
1994-04-01	6194563402.34322000
1994-07-01	6170808214.26367950
1994-10-01	7358378685.21657000
1995-01-01	7437441421.26280000
1995-04-01	7630168774.03747000
1995-07-01	7493265355.31591000
1995-10-01	8630205858.99157000
1996-01-01	8517064198.65394100
1996-04-01	8343098273.32661100
1996-07-01	7836971783.05071000
1996-10-01	9362353654.10295100
1997-01-01	9858815267.57948900
1997-04-01	10219498109.54150000
1997-07-01	9344114809.93408000
1997-10-01	10292212858.26320000
1998-01-01	10174024684.69190000
1998-04-01	10794341270.32600000
1998-07-01	10219837395.54750000
1998-10-01	12069649382.78930000
1999-01-01	11341709126.41310100
1999-04-01	11498344571.68950000
1999-07-01	11100236256.14580000
1999-10-01	12783508747.00450000
2000-01-01	12808385100.78299900
2000-04-01	12546747224.71490100
2000-07-01	12052633528.93070000
2000-10-01	13490636525.83820000
2001-01-01	13944979053.22730000
2001-04-01	12233131096.57180000
2001-07-01	11566608715.18190000
2001-10-01	12876328704.87500000
2002-01-01	13381164211.26380000
2002-04-01	13651452491.49980000
2002-07-01	12473790201.51110000
2002-10-01	12603019412.59930000
2003-01-01	13133404678.06230000
2003-04-01	13228806067.09920000
2003-07-01	12524643747.33160000
2003-10-01	15019606800.20710000
2004-01-01	14851721401.84110000
2004-04-01	14967204152.95209900
2004-07-01	14539963329.69040000
2004-10-01	17511624174.05490000
2005-01-01	17242078980.47189700
2005-04-01	17578217698.38649700
2005-07-01	15767671146.55820000
2005-10-01	17940321002.15910000
2006-01-01	17795130756.20129800
2006-04-01	17530136338.44310000
2006-07-01	17488720227.84410000
2006-10-01	20364134579.05410000
2007-01-01	20919637557.31680000
2007-04-01	19602470233.51920000
2007-07-01	19537843754.16340300
2007-10-01	23863146346.44160000
2008-01-01	23060565346.72910000
2008-04-01	22515201926.15250000
2008-07-01	20724658711.78570000
2008-10-01	17756330694.03500000
2009-01-01	15968261914.39690000
2009-04-01	15587005557.29720000
2009-07-01	14501985260.16900000
2009-10-01	16417244523.23149900
2010-01-01	15653359232.29800000
2010-04-01	15987101214.04620000
2010-07-01	14536735880.59120000
2010-10-01	17076661716.57020000
2011-01-01	18212423872.88850000
2011-04-01	19916483868.68610000
2011-07-01	17102213379.28180000
2011-10-01	17788326216.14820000
2012-01-01	18918981272.28000000
2012-04-01	18152267912.69450000
2012-07-01	16130323451.60459900
2012-10-01	17399558348.87890200
2013-01-01	18789725922.76049800
2013-04-01	17904668001.13920000
2013-07-01	17403381483.18320000
2013-10-01	19335757726.21740000
2014-01-01	20797612955.52520000
2014-04-01	20157748546.80490000
2014-07-01	20055391483.07980000
2014-10-01	21010695773.00890000
2015-01-01	18805707521.49080000
2015-04-01	18630004854.02029800
2015-07-01	18375402123.04800000
2015-10-01	21181669909.67640300
2016-01-01	19372599198.80930000
2016-04-01	21122513608.20850000
2016-07-01	19993651105.74950000
2016-10-01	20561544620.13870200
2017-01-01	20252785004.48880000
2017-04-01	23135663529.34820000
2017-07-01	20865979462.66500000
2017-10-01	24438960065.69700000
2018-01-01	26132826686.19230000
2018-04-01	25278418467.12780000