Quarter	US Dollars, sum over component sub-periods
1999-01-01	153406166881.73400
1999-04-01	303403219842.63495
1999-07-01	142537275669.46002
1999-10-01	199753921276.98700
2000-01-01	334945529830.83000
2000-04-01	204637269731.48200
2000-07-01	173558375828.63300
2000-10-01	135308457009.88101
2001-01-01	169632173347.61902
2001-04-01	132509759469.99501
2001-07-01	108340036631.63301
2001-10-01	59556963198.74860
2002-01-01	122252571747.12300
2002-04-01	118853215451.46800
2002-07-01	154986953594.00100
2002-10-01	45795550885.51980
2003-01-01	138752414071.46000
2003-04-01	86578003821.18880
2003-07-01	104103817613.47499
2003-10-01	99845428776.40959
2004-01-01	137651871446.10000
2004-04-01	205057708059.85000
2004-07-01	158830239201.04800
2004-10-01	171188382932.89398
2005-01-01	187821633715.77100
2005-04-01	155661200182.25500
2005-07-01	109048281189.43800
2005-10-01	98920466173.85310
2006-01-01	234573864071.48898
2006-04-01	172468994567.03300
2006-07-01	236348743706.62500
2006-10-01	228599000916.36502
2007-01-01	360468311824.84800
2007-04-01	336297517674.14700
2007-07-01	286871045254.17100
2007-10-01	441699116311.75000
2008-01-01	316232971722.93800
2008-04-01	347951543314.31396
2008-07-01	302432102788.52203
2008-10-01	236170298194.06302
2009-01-01	178152294648.36102
2009-04-01	86106056269.83140
2009-07-01	207631809221.17200
2009-10-01	110240315351.44499
2010-01-01	198400567752.36298
2010-04-01	200840061959.92100
2010-07-01	200452734840.12800
2010-10-01	170514812825.75500
2011-01-01	240840637218.62400
2011-04-01	288082735144.68396
2011-07-01	224500071666.55800
2011-10-01	153973181311.10700
2012-01-01	215831205501.70102
2012-04-01	198724089363.75302
2012-07-01	192708155003.51900
2012-10-01	119541344267.92000
2013-01-01	139364905908.02200
2013-04-01	250756577323.20398
2013-07-01	213896331484.76300
2013-10-01	176485909791.39100
2014-01-01	86683605746.95700
2014-04-01	193637143653.75700
2014-07-01	250795450084.84400
2014-10-01	134033274250.30400
2015-01-01	206960353658.41898
2015-04-01	183432397274.52402
2015-07-01	136970537597.54498
2015-10-01	138693220987.23300
2016-01-01	220376004418.95600
2016-04-01	212885767563.09300
2016-07-01	235703644865.20800
2016-10-01	120787702367.65999
2017-01-01	333494958737.20500
2017-04-01	172857599952.84302
2017-07-01	280566621058.31500
2017-10-01	178023073852.10300
2018-01-01	3644254011.16299