Quarter	US Dollars, sum over component sub-periods
2002-01-01	10505525967.407501
2002-04-01	8649894461.234640
2002-07-01	15606214562.447400
2002-10-01	15045022563.618400
2003-01-01	22284202571.368400
2003-04-01	12654967679.017900
2003-07-01	27471659625.608600
2003-10-01	28103111702.848000
2004-01-01	21562584306.301200
2004-04-01	11956042453.530000
2004-07-01	15156307400.909399
2004-10-01	25550514995.533203
2005-01-01	30520587030.152900
2005-04-01	40938102822.212600
2005-07-01	23958314578.723600
2005-10-01	21541677293.546703
2006-01-01	21845824182.508500
2006-04-01	66773274920.675700
2006-07-01	12890747447.191300
2006-10-01	65460048338.901500
2007-01-01	45402611989.569900
2007-04-01	97222087681.333510
2007-07-01	34890216093.959700
2007-10-01	61227601715.663500
2008-01-01	101190429114.314000
2008-04-01	33981011734.722400
2008-07-01	24272561049.696200
2008-10-01	67856644564.593605
2009-01-01	1644538804.090060
2009-04-01	-522939984.976716
2009-07-01	-41708295326.905500
2009-10-01	-64014179003.860100
2010-01-01	-23915669200.280700
2010-04-01	28301999818.473400
2010-07-01	37039866849.422390
2010-10-01	-121816792145.782000
2011-01-01	-35245705942.444200
2011-04-01	-40416903953.394196
2011-07-01	30770935365.366400
2011-10-01	-8959728901.344700
2012-01-01	-34656655410.232200
2012-04-01	-7088847864.603340
2012-07-01	-21205341491.440197
2012-10-01	-44404349559.515000
2013-01-01	19767350046.234700
2013-04-01	-5443449089.038899
2013-07-01	-4608305472.921630
2013-10-01	-18686729916.905900
2014-01-01	41216188852.636400
2014-04-01	-7799714054.174971
2014-07-01	12294221559.437199
2014-10-01	12621282586.458500
2015-01-01	9314286398.495369
2015-04-01	-6546696557.407260
2015-07-01	-32201427632.850700
2015-10-01	11708726537.114400
2016-01-01	13873662436.064400
2016-04-01	-3378618509.383960
2016-07-01	16090876240.529200
2016-10-01	6886361308.333130
2017-01-01	22793331907.087300
2017-04-01	8701435229.133160
2017-07-01	20082614754.884700
2017-10-01	-14764892689.451900
2018-01-01	42837444871.805305
2018-04-01	46351070751.166900