Quarter	US Dollars, monthly level
1999-01-01	1600354647.8439600
1999-04-01	1594847413.9885800
1999-07-01	6181896921.2534490
1999-10-01	-391905190.8996480
2000-01-01	-11570146156.5247000
2000-04-01	-12610110185.8210000
2000-07-01	-15539288710.6545000
2000-10-01	-21024470909.1169000
2001-01-01	-6394422900.1899800
2001-04-01	-10183184793.7484000
2001-07-01	1157885783.3420400
2001-10-01	5023075653.5930800
2002-01-01	9182867624.6484090
2002-04-01	9980116908.4147300
2002-07-01	16810052279.5304990
2002-10-01	2212632790.3776000
2003-01-01	-5106966397.1728300
2003-04-01	2160806481.9850903
2003-07-01	18193431620.5244980
2003-10-01	2163123328.1652703
2004-01-01	10702532713.7200000
2004-04-01	2246217371.0326500
2004-07-01	-5701588631.1649300
2004-10-01	-13601076464.9970990
2005-01-01	-10444488221.9417000
2005-04-01	-8753321238.2592200
2005-07-01	-18710680278.4229970
2005-10-01	-39508616000.8806000
2006-01-01	-41028192393.1591000
2006-04-01	-41916236443.7769000
2006-07-01	-48263065504.0584000
2006-10-01	-36835788610.6647000
2007-01-01	-42275077534.6356000
2007-04-01	-40752958297.2834000
2007-07-01	-48849739720.3458000
2007-10-01	-74274168569.7757000
2008-01-01	-71113315351.6882000
2008-04-01	-67863301398.0264000
2008-07-01	-85180989419.4685000
2008-10-01	-71431378725.8584900
2009-01-01	-52431123701.1585000
2009-04-01	-13385220881.0875990
2009-07-01	-11876236119.8013000
2009-10-01	-26414007508.9653000
2010-01-01	-27649491465.1143000
2010-04-01	-43662820318.8818000
2010-07-01	-27694540826.3168000
2010-10-01	-41978391244.4786000
2011-01-01	-36654768533.8667000
2011-04-01	-45025821365.1516000
2011-07-01	-43782467672.9388000
2011-10-01	-25840262349.7744000
2012-01-01	-27421339285.4608000
2012-04-01	-7923403253.5837710
2012-07-01	-12807295473.6570000
2012-10-01	-11487119065.3566990
2013-01-01	24966686947.7888030
2013-04-01	66700535478.7415000
2013-07-01	34892250487.3563000
2013-10-01	26697156233.9701000
2014-01-01	25447029040.9650000
2014-04-01	27271848286.2592000
2014-07-01	15896923847.9170000
2014-10-01	45477198205.9932900
2015-01-01	26449241212.2224000
2015-04-01	50554123931.3083000
2015-07-01	35042370404.2292000
2015-10-01	37467268354.6612000
2016-01-01	25859810232.1540000
2016-04-01	42424698328.0600050
2016-07-01	11271982409.4109000
2016-10-01	34828976433.4277000
2017-01-01	16964841130.6590000
2017-04-01	31257750497.8387000
2017-07-01	23642378311.8517000
2017-10-01	24433253874.1199000
2018-01-01	17392304921.8469000
2018-04-01	31131133050.2446980