Quarter	US Dollars, monthly level
1960-01-01	23145385.285468798
1960-04-01	15223097.112884700
1960-07-01	13910761.154877400
1960-10-01	21259842.519718400
1961-01-01	18372703.412102300
1961-04-01	16010498.687689101
1961-07-01	18001616.495588303
1961-10-01	23687877.380416702
1962-01-01	19972131.908978797
1962-04-01	19972131.908978797
1962-07-01	18578727.357189600
1962-10-01	25777984.208100498
1963-01-01	20901068.276838300
1963-04-01	20901068.276838300
1963-07-01	19739897.817013900
1963-10-01	32280538.783116903
1964-01-01	23455643.288451800
1964-04-01	26474686.483995200
1964-07-01	26939154.667924900
1964-10-01	33906177.426871000
1965-01-01	22758941.012557200
1965-04-01	33906177.426871000
1965-07-01	29725963.771503300
1965-10-01	42266604.737606300
1966-01-01	30422666.047397900
1966-04-01	33209475.150976400
1966-07-01	28564793.311679002
1966-10-01	48304691.128692900
1967-01-01	22526706.920592400
1967-04-01	25545750.116135700
1967-07-01	20901068.276838300
1967-10-01	28040791.488954000
1968-01-01	15069213.246884100
1968-04-01	21727702.821088698
1968-07-01	17522340.984748997
1968-10-01	26336650.709435600
1969-01-01	17139614.074926500
1969-04-01	24744608.399562700
1969-07-01	29965947.786626400
1969-10-01	35527809.307629100
1970-01-01	26674233.825216700
1970-04-01	40181611.804794500
1970-07-01	42224744.608428195
1970-10-01	37457434.733283000
1971-01-01	27468785.471074200
1971-04-01	43700340.522163495
1971-07-01	43369965.296329600
1971-10-01	35346602.608090700
1972-01-01	38892701.898870000
1972-04-01	52161976.664366900
1972-07-01	52505147.563474500
1972-10-01	46973236.687246900
1973-01-01	52222221.719161704
1973-04-01	87805902.957590000
1973-07-01	64539916.262147500
1973-10-01	78281622.956238200
1974-01-01	67934169.405999900
1974-04-01	104417351.976767000
1974-07-01	84343896.287817600
1974-10-01	79214826.793333400
1975-01-01	51266603.652454900
1975-04-01	95912894.862244590
1975-07-01	75104011.063550310
1975-10-01	83901553.483667400
1976-01-01	64502839.396107200
1976-04-01	118807253.134436010
1976-07-01	111746508.374948000
1976-10-01	106389913.454191010
1977-01-01	113634587.926784010
1977-04-01	135581980.412749000
1977-07-01	132379440.927216010
1977-10-01	130751727.204903990
1978-01-01	126027838.220597980
1978-04-01	148248306.965004980
1978-07-01	172176285.209732000
1978-10-01	194940867.754921020
1979-01-01	156525056.277638000
1979-04-01	179988555.665214000
1979-07-01	204165145.563613000
1979-10-01	239247326.112054970
1980-01-01	184194469.976834000
1980-04-01	251363516.625260030
1980-07-01	238650002.304957000
1980-10-01	245777535.800641000
1981-01-01	175745323.495331020
1981-04-01	244547801.633315000
1981-07-01	221649623.777199000
1981-10-01	255093907.910747000
1982-01-01	155066486.954873000
1982-04-01	204556917.598036000
1982-07-01	151460335.293630000
1982-10-01	176674574.573788000
1983-01-01	167308441.120118000
1983-04-01	184193071.841358000
1983-07-01	199904476.786675000
1983-10-01	188105393.187374000
1984-01-01	169871833.684559000
1984-04-01	194310364.021638000
1984-07-01	187104542.587005020
1984-10-01	188467784.983024000
1985-01-01	164522184.975714000
1985-04-01	208414562.152498000
1985-07-01	217898419.819118000
1985-10-01	221694633.944094000
1986-01-01	206744113.847123000
1986-04-01	304225234.145731000
1986-07-01	290886036.954205040
1986-10-01	259658235.734112000
1987-01-01	247773322.967370000
1987-04-01	413669508.832602000
1987-07-01	352993750.206877000
1987-10-01	360957183.458194000
1988-01-01	291110915.553410000
1988-04-01	397981552.775282000
1988-07-01	352121868.325448040
1988-10-01	381165227.934089000
1989-01-01	323093831.535554000
1989-04-01	383671725.275174000
1989-07-01	334587191.588177000
1989-10-01	363466056.318681000
1990-01-01	327063860.183353960
1990-04-01	438751449.256365000
1990-07-01	412781472.706732000
1990-10-01	410390493.945697000
1991-01-01	383713652.992964000
1991-04-01	408449285.794701040
1991-07-01	375068254.557056000
1991-10-01	378923400.250216960
1992-01-01	348801393.669807000
1992-04-01	392708228.336035000
1992-07-01	413803105.517958000
1992-10-01	370590880.333243000
1993-01-01	321213603.261164960
1993-04-01	355163600.422338000
1993-07-01	348068661.642824000
1993-10-01	371884235.421332960
1994-01-01	371474224.692265000
1994-04-01	396245868.252463000
1994-07-01	397480840.305599000
1994-10-01	459562907.071754040
1995-01-01	440138677.536928950
1995-04-01	469142211.759675000
1995-07-01	413981016.855358000
1995-10-01	478498643.516292040
1996-01-01	489346972.114870000
1996-04-01	454442323.124914000
1996-07-01	431033812.581333000
1996-10-01	519066957.938337000
1997-01-01	473560167.532210950
1997-04-01	455624166.148911000
1997-07-01	433186469.243760000
1997-10-01	487430997.430849000
1998-01-01	397495921.106087000
1998-04-01	500634302.523642060
1998-07-01	516574172.938061950
1998-10-01	506193698.564124000
1999-01-01	502552838.674879000
1999-04-01	498481662.903269000
1999-07-01	466526877.002203050
1999-10-01	531573935.330925000
2000-01-01	488995470.408340040
2000-04-01	477662791.414570030
2000-07-01	478974221.055973000
2000-10-01	450362145.766419000
2001-01-01	526809354.939927000
2001-04-01	457299942.222705960
2001-07-01	476241605.372709000
2001-10-01	552791292.690351000
2002-01-01	524096521.083763060
2002-04-01	581944686.377636900
2002-07-01	558089080.515124000
2002-10-01	567172424.610593100
2003-01-01	627676456.858632100
2003-04-01	582588512.858521900
2003-07-01	565700287.810200000
2003-10-01	604848835.004363100
2004-01-01	734261713.744363000
2004-04-01	657111272.677642000
2004-07-01	703247363.121572000
2004-10-01	794841400.266104000
2005-01-01	763040706.014285000
2005-04-01	868105437.417006000
2005-07-01	711764506.632499000
2005-10-01	749204797.097755000
2006-01-01	791757963.973794100
2006-04-01	942400615.024140000
2006-07-01	857742439.536811000
2006-10-01	873246838.354316000
2007-01-01	1070143843.154640000
2007-04-01	934752221.896779000
2007-07-01	853122554.134441000
2007-10-01	1384931541.937910000
2008-01-01	1144995027.631370000
2008-04-01	1693315584.236920000
2008-07-01	1369889133.922720000
2008-10-01	1167970656.012490000
2009-01-01	991452553.791114000
2009-04-01	876298681.193237900
2009-07-01	1084564364.674020000
2009-10-01	1103491827.182880000
2010-01-01	1068589545.287240000
2010-04-01	1094952906.815800000
2010-07-01	1131488219.308420000
2010-10-01	1279223654.870060000
2011-01-01	1223601269.293410000
2011-04-01	1250512962.562530000
2011-07-01	1503411084.044520100
2011-10-01	1346749544.911980000
2012-01-01	1254186147.109130000
2012-04-01	1233641331.055000000
2012-07-01	1212569698.080350000
2012-10-01	1295459812.778220000
2013-01-01	1228318570.162960000
2013-04-01	1158748473.128870000
2013-07-01	1292342702.667730000
2013-10-01	1298435519.004060000
2014-01-01	1198117220.496909900
2014-04-01	1188494443.923420000
2014-07-01	1359903743.357530000
2014-10-01	1310066101.792320000
2015-01-01	1235289855.645000000
2015-04-01	1258777571.499520000
2015-07-01	1117774801.825870000
2015-10-01	1134439110.490530000
2016-01-01	1032148760.690450100
2016-04-01	1152254240.055700000
2016-07-01	1107272984.296640000
2016-10-01	1163453068.117690000
2017-01-01	972196942.163392100
2017-04-01	1297698086.884290000
2017-07-01	1199449832.091640000
2017-10-01	1377470792.104920100
2018-01-01	1361291106.168360000
2018-04-01	1443468816.516320000
2018-07-01	1357342518.610470000