Quarter	US Dollars, monthly level
1960-01-01	328260108.566387000
1960-04-01	206352077.192130000
1960-07-01	281385147.826365000
1960-10-01	436019776.347488000
1961-01-01	465914917.097526000
1961-04-01	423502553.919339000
1961-07-01	436285065.487881960
1961-10-01	317852041.190511050
1962-01-01	151679840.891939000
1962-04-01	239761603.553222000
1962-07-01	249700218.206700000
1962-10-01	239400048.961321000
1963-01-01	185739305.591306980
1963-04-01	299281882.803100000
1963-07-01	314313684.788504000
1963-10-01	718218383.095172000
1964-01-01	610187584.548072000
1964-04-01	497034307.496822950
1964-07-01	177116029.937800020
1964-10-01	255800376.268901020
1965-01-01	275334901.427122000
1965-04-01	-9811560.856027741
1965-07-01	-112185743.879974010
1965-10-01	156376613.760932000
1966-01-01	204661015.471165000
1966-04-01	341169976.824740000
1966-07-01	563583276.955073000
1966-10-01	880227750.437482000
1967-01-01	1087411426.113160000
1967-04-01	1116385301.722869900
1967-07-01	943298078.460902900
1967-10-01	1072811460.306619900
1968-01-01	1085888333.590370000
1968-04-01	863362494.482122000
1968-07-01	1041875387.647309900
1968-10-01	1620114463.098620000
1969-01-01	691892261.316548000
1969-04-01	977674654.980651000
1969-07-01	1006638572.336000100
1969-10-01	1325966145.430060000
1970-01-01	801925174.008671000
1970-04-01	930596243.055428000
1970-07-01	1174090430.951400000
1970-10-01	1398609593.311090000
1971-01-01	1012732156.956350100
1971-04-01	904842142.156176000
1971-07-01	1366926708.256170000
1971-10-01	1312161559.383500000
1972-01-01	1407365418.708940000
1972-04-01	1231372507.869880000
1972-07-01	1445346069.182390000
1972-10-01	2265416578.207930000
1973-01-01	1963980736.832769900
1973-04-01	2531741620.145780000
1973-07-01	4150389072.225239800
1973-10-01	3995663520.985010000
1974-01-01	4903757435.720961000
1974-04-01	4796547497.636770000
1974-07-01	4495471958.320560000
1974-10-01	5504022664.126380000
1975-01-01	4526519158.098880000
1975-04-01	3920020495.689960000
1975-07-01	3248734310.115180000
1975-10-01	3563131043.779690000
1976-01-01	3351157937.679700000
1976-04-01	2972564088.872680000
1976-07-01	3337752073.951170000
1976-10-01	4058243764.784000000
1977-01-01	3714686373.819030000
1977-04-01	4015822996.486180000
1977-07-01	3449221390.915000000
1977-10-01	5453548106.617100000
1978-01-01	4421428380.918720000
1978-04-01	4933195494.512549000
1978-07-01	4764455273.077500000
1978-10-01	6497531541.620009000
1979-01-01	4216968520.914190000
1979-04-01	3705761426.410050000
1979-07-01	1906043147.906840000
1979-10-01	2304452265.861030000
1980-01-01	1521388936.905790000
1980-04-01	929648924.998618000
1980-07-01	836954279.279279000
1980-10-01	1608120819.076880000
1981-01-01	-93707418.350235610
1981-04-01	2878115747.858550000
1981-07-01	2918909221.724290000
1981-10-01	6388140940.595530500
1982-01-01	4752354245.115450000
1982-04-01	5567331086.194820000
1982-07-01	4697523024.018050000
1982-10-01	6083947142.552509000
1983-01-01	4947731837.000319500
1983-04-01	4107872559.012880000
1983-07-01	3144778109.866830000
1983-10-01	4353485179.329490000
1984-01-01	4198665317.755049700
1984-04-01	3168806955.601760000
1984-07-01	4139015637.841289500
1984-10-01	7172344363.922120000
1985-01-01	4180210496.146090000
1985-04-01	6013161855.703500000
1985-07-01	6173630661.735450000
1985-10-01	9143589772.697950000
1986-01-01	9607361816.038740000
1986-04-01	12519773003.130901000
1986-07-01	14107697942.294800000
1986-10-01	16181409105.248299000
1987-01-01	15066110954.063600000
1987-04-01	15536562264.569000000
1987-07-01	15164275663.331900000
1987-10-01	19988341776.605100000
1988-01-01	15040358370.122900000
1988-04-01	19927281286.618200000
1988-07-01	16989445528.106699000
1988-10-01	20918733708.814400000
1989-01-01	19340468587.802800000
1989-04-01	17750542904.916200000
1989-07-01	17791980004.158600000
1989-10-01	16700758504.026802000
1990-01-01	21862542583.392500000
1990-04-01	16596757761.754400000
1990-07-01	15907842851.763500000
1990-10-01	10123100919.264599000
1991-01-01	4650957862.415890000
1991-04-01	-721986003.230024100
1991-07-01	2882433202.714330000
1991-10-01	6768007683.009280000
1992-01-01	4686165620.304230000
1992-04-01	3574117883.912530000
1992-07-01	8627286992.147490000
1992-10-01	4960148787.885310000
1993-01-01	9032245137.218119000
1993-04-01	9137923984.920580000
1993-07-01	6738747034.395061000
1993-10-01	11530179830.035100000
1994-01-01	8927260236.631480000
1994-04-01	13487941628.387499000
1994-07-01	10354246820.587200000
1994-10-01	11504882352.941200000
1995-01-01	13349851552.271801000
1995-04-01	17006699695.602300000
1995-07-01	14282411250.000000000
1995-10-01	17659750658.550903000
1996-01-01	13993673971.399399000
1996-04-01	15726317679.216800000
1996-07-01	18062614088.481400000
1996-10-01	19229879019.928097000
1997-01-01	12974766659.764800000
1997-04-01	17462270406.281000000
1997-07-01	17465858270.655900000
1997-10-01	18676369600.106197000
1998-01-01	15448562209.148900000
1998-04-01	18974095287.307200000
1998-07-01	17997829203.675297000
1998-10-01	19393385456.295900000
1999-01-01	17193625736.098400000
1999-04-01	16582524264.715601000
1999-07-01	16433254265.342500000
1999-10-01	19223696890.474800000
2000-01-01	16163788582.902601000
2000-04-01	15321542094.041601000
2000-07-01	11853163930.871399000
2000-10-01	11507668328.439402000
2001-01-01	20797351872.288002000
2001-04-01	19315790113.203200000
2001-07-01	22774309187.962300000
2001-10-01	22661700483.111400000
2002-01-01	29212445354.430798000
2002-04-01	29167322734.162600000
2002-07-01	34959297783.474300000
2002-10-01	32206432993.381100000
2003-01-01	32023101179.480797000
2003-04-01	33891936731.816000000
2003-07-01	43253933904.684500000
2003-10-01	37853051874.834000000
2004-01-01	51700071326.850395000
2004-04-01	52184630095.634800000
2004-07-01	44543966850.293010000
2004-10-01	45330530898.635800000
2005-01-01	55906927262.305210000
2005-04-01	50419976051.734406000
2005-07-01	48877108062.171000000
2005-10-01	39253379475.527600000
2006-01-01	47793890213.461900000
2006-04-01	44794377509.184700000
2006-07-01	49792519423.044900000
2006-10-01	59311075957.102400000
2007-01-01	62825105532.583000000
2007-04-01	64562050236.770600000
2007-07-01	68640660381.090600000
2007-10-01	70315306290.477400000
2008-01-01	76033278783.803500000
2008-04-01	82725503114.952800000
2008-07-01	60035413911.062700000
2008-10-01	44365815798.715400000
2009-01-01	35947484520.352700000
2009-04-01	46563992558.119400000
2009-07-01	51641872969.326004000
2009-10-01	60461133649.738100000
2010-01-01	51996204520.969000000
2010-04-01	47026454482.195300000
2010-07-01	50061006461.719200000
2010-10-01	55165301954.612900000
2011-01-01	55552969443.453800000
2011-04-01	54927322346.490600000
2011-07-01	55531139218.303900000
2011-10-01	52932731021.490100000
2012-01-01	61323277732.413500000
2012-04-01	61913032919.924200000
2012-07-01	63957141911.507300000
2012-10-01	59075759493.766200000
2013-01-01	64713957635.842510000
2013-04-01	64157342481.840004000
2013-07-01	66641077658.302605000
2013-10-01	68295104642.557900000
2014-01-01	65717441078.837690000
2014-04-01	70505136725.577000000
2014-07-01	78133473429.115200000
2014-10-01	72548276063.873600000
2015-01-01	66191209669.075410000
2015-04-01	71885249989.172910000
2015-07-01	69760125160.153700000
2015-10-01	67465244597.449900000
2016-01-01	64806910311.547195000
2016-04-01	79601923322.862210000
2016-07-01	70003122751.273100000
2016-10-01	64327191593.077300000
2017-01-01	64377123922.740690000
2017-04-01	69126700153.464400000
2017-07-01	75040553360.962100000
2017-10-01	72557572304.059710000
2018-01-01	75343346949.189390000
2018-04-01	75091093207.522600000