Quarter	US Dollars, monthly level
1957-01-01	438603763.17587703
1957-04-01	345998677.68115500
1957-07-01	553301072.12164600
1957-10-01	1095446554.56689000
1958-01-01	424376207.06840600
1958-04-01	736450983.67211400
1958-07-01	735071771.06010400
1958-10-01	1114180189.58090000
1959-01-01	83863629.27750970
1959-04-01	122307169.10369100
1959-07-01	310041382.18586004
1959-10-01	825694165.72898600
1960-01-01	450810464.05156000
1960-04-01	604046519.68329000
1960-07-01	674880009.69753800
1960-10-01	1575519857.45107000
1961-01-01	1132332953.61747000
1961-04-01	866509310.77398300
1961-07-01	1040295801.90708000
1961-10-01	1285710190.00989990
1962-01-01	83330472.91296010
1962-04-01	949157046.58330400
1962-07-01	481086042.46285903
1962-10-01	646348755.67355100
1963-01-01	163740418.67544500
1963-04-01	553284257.39245100
1963-07-01	28759074.41174700
1963-10-01	1108158655.88622000
1964-01-01	247985191.93516500
1964-04-01	515323877.17183600
1964-07-01	891475791.25164100
1964-10-01	1691495939.80811000
1965-01-01	450533746.94140600
1965-04-01	1048675263.30135010
1965-07-01	869974608.60646600
1965-10-01	1628639758.15847000
1966-01-01	340590519.79426900
1966-04-01	660726906.17918100
1966-07-01	762628553.47411600
1966-10-01	2007469345.73006000
1967-01-01	571367512.79113790
1967-04-01	1161205138.50385000
1967-07-01	765451622.66167400
1967-10-01	232398077.76051500
1968-01-01	-112638403.53266299
1968-04-01	124662585.94626600
1968-07-01	655914244.65406400
1968-10-01	1257012281.95260000
1969-01-01	-482588836.01991695
1969-04-01	563771433.85234090
1969-07-01	632030899.39463590
1969-10-01	1566530434.57174000
1970-01-01	844232969.66173600
1970-04-01	1416127083.64134000
1970-07-01	1048343469.37951990
1970-10-01	2613753388.56351000
1971-01-01	985775021.70239800
1971-04-01	1275619062.70493000
1971-07-01	2851270485.02268030
1971-10-01	2208734033.19894000
1972-01-01	-308709842.08398200
1972-04-01	703872900.14562390
1972-07-01	127935406.09992601
1972-10-01	2810867732.88286000
1973-01-01	-741066129.29182000
1973-04-01	-345385329.32317700
1973-07-01	821905981.75064100
1973-10-01	1575526792.73245000
1974-01-01	-6600500395.32337000
1974-04-01	-9428285186.98897200
1974-07-01	-8746974717.93636900
1974-10-01	-2122125079.00376000
1975-01-01	-745805715.77883900
1975-04-01	2775130632.97495030
1975-07-01	-1049491045.34479010
1975-10-01	1293886845.48061010
1976-01-01	-4405669918.39172000
1976-04-01	-4015975356.73183970
1976-07-01	-6958297589.89863000
1976-10-01	-4598241687.19849000
1977-01-01	-9517904267.71706000
1977-04-01	-6311281978.24523000
1977-07-01	-4813306855.75315950
1977-10-01	-1010706816.16727010
1978-01-01	-6432343408.42008000
1978-04-01	-541573333.85712400
1978-07-01	-1839352324.34699000
1978-10-01	2153537761.03032970
1979-01-01	-9029669683.75400000
1979-04-01	-9435087884.46441800
1979-07-01	-16155587961.41040000
1979-10-01	-18166316008.14890000
1980-01-01	-29002015361.24450000
1980-04-01	-22011725433.01080000
1980-07-01	-17196429043.71859700
1980-10-01	-9851000091.53912000
1981-01-01	-15603006187.40490000
1981-04-01	-10215602832.39300000
1981-07-01	-11599004942.30730000
1981-10-01	-5255001284.48062000
1982-01-01	-12320176371.42690000
1982-04-01	-3367540892.23074000
1982-07-01	-11953746789.21190000
1982-10-01	-3834663096.32067970
1983-01-01	-9917519091.04236000
1983-04-01	-8215098629.01157950
1983-07-01	-13422624682.90100100
1983-10-01	-9965468364.97356000
1984-01-01	-23447208371.22660000
1984-04-01	-25439995638.07630000
1984-07-01	-23116373429.70990000
1984-10-01	-15165645863.64210000
1985-01-01	-22395743474.06440000
1985-04-01	-20261604913.73909800
1985-07-01	-20063048603.02369700
1985-10-01	-16727469861.18710000
1986-01-01	-19804364092.70650000
1986-04-01	-6952535343.34715000
1986-07-01	-7165085255.45016000
1986-10-01	-623455940.05160500
1987-01-01	-12572895822.18080100
1987-04-01	-16660326740.71060200
1987-07-01	-16536335979.94150200
1987-10-01	-8912922135.59934000
1988-01-01	-21524720916.43210000
1988-04-01	-6232889191.85785000
1988-07-01	-10523294543.07890100
1988-10-01	-5127982262.47972000
1989-01-01	-9498159385.57823000
1989-04-01	-11148009832.60279800
1989-07-01	-11329954255.27760100
1989-10-01	-8040592101.27200000
1990-01-01	-9192311390.89575000
1990-04-01	-3746151755.61562970
1990-07-01	-10573088392.33650000
1990-10-01	-16141391472.61260000
1991-01-01	-11759519029.85890000
1991-04-01	-4107378223.16546960
1991-07-01	-7579951900.77394000
1991-10-01	7749217989.52777000
1992-01-01	4876782018.53893900
1992-04-01	580737755.25103800
1992-07-01	182470636.22979700
1992-10-01	8794953796.26114000
1993-01-01	16337317227.64029900
1993-04-01	11865064197.83360100
1993-07-01	5167104051.78908900
1993-10-01	21149448619.90060000
1994-01-01	13416230112.00070000
1994-04-01	11765155803.14250000
1994-07-01	2177023243.03998000
1994-10-01	9083243360.83658000
1995-01-01	16192971314.52579900
1995-04-01	14306978938.01630000
1995-07-01	2350245132.69714000
1995-10-01	18482850126.26400000
1996-01-01	8565749328.03784100
1996-04-01	2981552758.80823000
1996-07-01	-3508429332.10275030
1996-10-01	11191757041.26089900
1997-01-01	-2653749039.16608000
1997-04-01	6750923190.37414000
1997-07-01	-5814086576.09451000
1997-10-01	7993274753.79196000
1998-01-01	-5392081941.21663950
1998-04-01	-8310106810.27432000
1998-07-01	-21249324895.69450000
1998-10-01	-6210301045.37155100
1999-01-01	-24683395429.13020000
1999-04-01	-36532374992.48370000
1999-07-01	-47815115159.44260000
1999-10-01	-44441189428.96599600
2000-01-01	-58772624573.45730000
2000-04-01	-68323958230.16280000
2000-07-01	-88000161584.14580000
2000-10-01	-90669017792.42820000
2001-01-01	-69563136413.29350000
2001-04-01	-72990724637.51190000
2001-07-01	-77476943414.65921000
2001-10-01	-64104468274.69601000
2002-01-01	-53836709436.77340000
2002-04-01	-65086131432.71880000
2002-07-01	-77967204740.41730000
2002-10-01	-85746017764.68510000
2003-01-01	-89228170716.10910000
2003-04-01	-92690859860.67040000
2003-07-01	-82418886141.96760000
2003-10-01	-81427803853.42020000
2004-01-01	-77575137128.25680000
2004-04-01	-97167051224.95140000
2004-07-01	-124602085624.74300000
2004-10-01	-136042871382.59201000
2005-01-01	-124534801767.76700000
2005-04-01	-143108249420.47300000
2005-07-01	-167473924664.27600000
2005-10-01	-173441417559.41100000
2006-01-01	-157200503281.64600000
2006-04-01	-169281410679.87302000
2006-07-01	-205862205302.08200000
2006-10-01	-158871277667.13602000
2007-01-01	-151243823221.04200000
2007-04-01	-161106934596.97897000
2007-07-01	-179267287679.53400000
2007-10-01	-185834745865.11200000
2008-01-01	-159893431330.23102000
2008-04-01	-189155692775.36400000
2008-07-01	-237935329168.61500000
2008-10-01	-191769052293.87903000
2009-01-01	-136653606315.57399000
2009-04-01	-107888444632.19899000
2009-07-01	-131999549183.43200000
2009-10-01	-125660351232.63500000
2010-01-01	-128757493018.78000000
2010-04-01	-162345159233.81000000
2010-07-01	-189670284586.98800000
2010-10-01	-160053254689.27002000
2011-01-01	-186380224934.38800000
2011-04-01	-234725535630.48700000
2011-07-01	-230632280143.33900000
2011-10-01	-210895816433.89600000
2012-01-01	-204328173587.17902000
2012-04-01	-214403161230.80700000
2012-07-01	-221246367839.02200000
2012-10-01	-203073459370.54200000
2013-01-01	-184238563788.64600000
2013-04-01	-185270808612.90600000
2013-07-01	-226560341375.78200000
2013-10-01	-190841655914.97400000
2014-01-01	-200623662156.48800000
2014-04-01	-204145668435.91998000
2014-07-01	-215967098886.84300000
2014-10-01	-178279677143.11398000
2015-01-01	-173485217879.95600000
2015-04-01	-166465956801.10202000
2015-07-01	-195868875463.64600000
2015-10-01	-170424045433.22202000
2016-01-01	-153287086843.20100000
2016-04-01	-141866747794.68400000
2016-07-01	-179492077854.55300000
2016-10-01	-155363169705.72200000
2017-01-01	-170394680022.45200000
2017-04-01	-175301011157.77100000
2017-07-01	-184200565121.84200000
2017-10-01	-182672670510.75100000
2018-01-01	-187517202748.81100000