Quarter	US Dollars, monthly level
1960-01-01	-100466666.66666700
1960-04-01	-140966666.66666698
1960-07-01	-158000000.00000000
1960-10-01	-99466666.66666661
1961-01-01	-117033333.33333300
1961-04-01	-135633333.33333300
1961-07-01	-135900000.00000000
1961-10-01	-102200000.00000000
1962-01-01	-100466666.66666700
1962-04-01	-131033333.33333300
1962-07-01	-131899999.99999999
1962-10-01	-87700000.00000000
1963-01-01	-80633333.33333331
1963-04-01	-134800000.00000000
1963-07-01	-172933333.33333300
1963-10-01	-125733333.33333300
1964-01-01	-97500000.00000000
1964-04-01	-159366666.66666698
1964-07-01	-197600000.00000000
1964-10-01	-122100000.00000000
1965-01-01	-160833333.33333300
1965-04-01	-223900000.00000000
1965-07-01	-214233333.33333300
1965-10-01	-207066666.66666700
1966-01-01	-164200000.00000000
1966-04-01	-212666666.66666700
1966-07-01	-232800000.00000000
1966-10-01	-207233333.33333300
1967-01-01	-138466666.66666698
1967-04-01	-208033333.33333300
1967-07-01	-178033333.33333300
1967-10-01	-166500000.00000000
1968-01-01	-159866666.66666698
1968-04-01	-238833333.33333302
1968-07-01	-242233333.33333300
1968-10-01	-284500000.00000000
1969-01-01	-311233333.33333296
1969-04-01	-261200000.00000000
1969-07-01	-243866666.66666700
1969-10-01	-224166666.66666700
1970-01-01	-326600000.00000000
1970-04-01	-319100000.00000000
1970-07-01	-331466666.66666704
1970-10-01	-338666666.66666700
1971-01-01	-219600000.00000000
1971-04-01	-521599999.99999994
1971-07-01	-319233333.33333296
1971-10-01	-374766666.66666704
1972-01-01	-259000000.00000000
1972-04-01	-406066666.66666704
1972-07-01	-391333333.33333296
1972-10-01	-418433333.33333300
1973-01-01	-426466666.66666700
1973-04-01	-560466666.66666700
1973-07-01	-576066666.66666700
1973-10-01	-456753971.43113900
1974-01-01	-529538088.06071700
1974-04-01	-664266666.66666700
1974-07-01	-516033333.33333300
1974-10-01	-665400000.00000000
1975-01-01	-775016110.75309400
1975-04-01	-877320882.39095200
1975-07-01	-649030347.08009400
1975-10-01	-764856907.04455400
1976-01-01	-735180629.80032190
1976-04-01	-781845154.56477300
1976-07-01	-956445912.66025600
1976-10-01	-1026873895.41532000
1977-01-01	-801214204.40595510
1977-04-01	-1133365809.28364010
1977-07-01	-1146282524.67154000
1977-10-01	-1016284969.45069990
1978-01-01	-907503914.73895800
1978-04-01	-1199526192.51376990
1978-07-01	-1033137606.69820010
1978-10-01	-1322425693.87548000
1979-01-01	-936238843.37296600
1979-04-01	-1232053233.78000000
1979-07-01	-1917837273.42437000
1979-10-01	-1644550223.43112000
1980-01-01	-986377924.66118600
1980-04-01	-1313491223.62260990
1980-07-01	-1494498784.59273000
1980-10-01	-1597431103.16234020
1981-01-01	-350677386.43461597
1981-04-01	-1548620444.44658020
1981-07-01	-1132937880.40669010
1981-10-01	-1503859263.40915010
1982-01-01	-1847539435.11981990
1982-04-01	-1215755838.72342000
1982-07-01	-1152627600.12633010
1982-10-01	-1519448788.29743980
1983-01-01	-996122014.71775590
1983-04-01	-1541174475.01980000
1983-07-01	-854474355.58843200
1983-10-01	-1730124067.54735000
1984-01-01	-727612232.17987410
1984-04-01	-873132888.35347400
1984-07-01	-787595909.25369610
1984-10-01	-2246544229.31585000
1985-01-01	-883483266.93404900
1985-04-01	-1789735494.55961000
1985-07-01	-985142994.90703100
1985-10-01	-1927845233.61668010
1986-01-01	-1464565256.08481980
1986-04-01	-1413645648.81396990
1986-07-01	-1240451002.48036000
1986-10-01	-1562884541.25114000
1987-01-01	-1732646687.72539020
1987-04-01	-1661840369.76285000
1987-07-01	-881720837.02283800
1987-10-01	-2506871446.88388000
1988-01-01	-1529751650.87568020
1988-04-01	-1788484185.71295000
1988-07-01	-1863327102.97000000
1988-10-01	-1730423209.08814000
1989-01-01	-1773941403.54607000
1989-04-01	-1758187889.49504000
1989-07-01	-2224941242.25384000
1989-10-01	-2829621779.89176000
1990-01-01	-2871316096.89970970
1990-04-01	-3445347288.70341000
1990-07-01	-3010509212.07395000
1990-10-01	-2458573269.73529000
1991-01-01	-3360100119.81298000
1991-04-01	-2754463513.00427000
1991-07-01	-2298260341.34667000
1991-10-01	-4516080760.47461000
1992-01-01	-2846650253.90226000
1992-04-01	-3994323442.37752960
1992-07-01	-3200766747.56233020
1992-10-01	-3585003828.02536000
1993-01-01	-4428224450.41436000
1993-04-01	-4220531690.80009030
1993-07-01	-3923621392.76530030
1993-10-01	-4657851250.64492000
1994-01-01	-3532624505.24304000
1994-04-01	-3669539206.96334030
1994-07-01	-3349657972.95269000
1994-10-01	-3758795753.37454030
1995-01-01	-3270104776.04867030
1995-04-01	-4504203958.48088000
1995-07-01	-3945170832.07062960
1995-10-01	-4985881301.90016000
1996-01-01	-3974078099.14549000
1996-04-01	-4986932063.41602000
1996-07-01	-4239882173.69223000
1996-10-01	-5223803735.62118100
1997-01-01	-4062671228.79569000
1997-04-01	-4361447689.90572000
1997-07-01	-4059870447.54644000
1997-10-01	-4676914950.76572000
1998-01-01	-4714026633.74006900
1998-04-01	-4441642171.94994100
1998-07-01	-4538565972.16393000
1998-10-01	-6394533468.08063000
1999-01-01	-5216721277.17897000
1999-04-01	-4722571296.45374000
1999-07-01	-4459065347.21122000
1999-10-01	-5941599361.76785100
2000-01-01	-5425467046.28694000
2000-04-01	-5968324719.87346100
2000-07-01	-5399612074.76163000
2000-10-01	-5270085051.85649000
2001-01-01	-5436159213.44493000
2001-04-01	-5669004763.99574000
2001-07-01	-4734147313.56743000
2001-10-01	-5738981749.43581000
2002-01-01	-5179301445.31348000
2002-04-01	-5779777449.37908900
2002-07-01	-6421123616.62981000
2002-10-01	-7627060082.04180050
2003-01-01	-7934198109.85978000
2003-04-01	-8343009793.16210000
2003-07-01	-8136361521.81362900
2003-10-01	-9513149621.18298000
2004-01-01	-9947192185.08680000
2004-04-01	-10100324856.18120000
2004-07-01	-9657560928.32877000
2004-10-01	-9775883008.78580000
2005-01-01	-10346859036.29350000
2005-04-01	-9424862683.30622000
2005-07-01	-9892347358.22511000
2005-10-01	-9614781318.51983000
2006-01-01	-10831612159.78280000
2006-04-01	-11474983398.77450000
2006-07-01	-11480208570.40600000
2006-10-01	-11998429054.12620000
2007-01-01	-14894925452.87209900
2007-04-01	-13814571274.18900000
2007-07-01	-13813374358.51410000
2007-10-01	-15774877944.69159900
2008-01-01	-16699769297.50370000
2008-04-01	-18068169745.07490000
2008-07-01	-16677095337.39460000
2008-10-01	-13746532652.02990000
2009-01-01	-11366053000.41989900
2009-04-01	-11863247633.14500000
2009-07-01	-12723619141.67039900
2009-10-01	-12966747539.39779900
2010-01-01	-12881776758.62140000
2010-04-01	-9677039905.60615200
2010-07-01	-9044985314.27453000
2010-10-01	-9397543589.83529900
2011-01-01	-9569484659.31010000
2011-04-01	-8775107012.67952000
2011-07-01	-8665082973.60241000
2011-10-01	-7116584670.21093000
2012-01-01	-8661213178.07086000
2012-04-01	-6976770204.80480000
2012-07-01	-6152502213.55860000
2012-10-01	-6484864938.73987000
2013-01-01	-7200482558.06038000
2013-04-01	-5862025248.59671000
2013-07-01	-6361289509.38743000
2013-10-01	-6742685021.65987000
2014-01-01	-7779600186.93857000
2014-04-01	-7006167197.08089900
2014-07-01	-6971891189.65846000
2014-10-01	-6438876920.61639000
2015-01-01	-5325038548.56208000
2015-04-01	-5032295995.42009900
2015-07-01	-3696282770.71274000
2015-10-01	-5558909421.35897900
2016-01-01	-4932821017.24607900
2016-04-01	-5799321884.57327000
2016-07-01	-4500423922.72387000
2016-10-01	-5473207990.24848900
2017-01-01	-6935924269.53449900
2017-04-01	-5575649181.57979000
2017-07-01	-5362841524.78384000
2017-10-01	-6218116981.03426000
2018-01-01	-6543650425.94096000
2018-04-01	-6191776892.33097900