Quarter	US Dollars, sum over component sub-periods
2004-01-01	17354694070.897300
2004-04-01	20615261289.927800
2004-07-01	20387268237.559100
2004-10-01	22728477260.261900
2005-01-01	21812051320.195500
2005-04-01	23065138288.791700
2005-07-01	23146067287.156500
2005-10-01	25257112211.032800
2006-01-01	25752853651.495200
2006-04-01	28297108928.820198
2006-07-01	29991802143.456303
2006-10-01	34059150621.753000
2007-01-01	34576620545.315200
2007-04-01	37567712592.537400
2007-07-01	39251459438.865200
2007-10-01	46202598313.918600
2008-01-01	49446387888.140200
2008-04-01	55614654942.342400
2008-07-01	54118021133.140396
2008-10-01	41586263196.099600
2009-01-01	31480951510.470802
2009-04-01	33524244512.909100
2009-07-01	37854519149.168400
2009-10-01	41272160983.793300
2010-01-01	40362364153.228004
2010-04-01	40467164831.552605
2010-07-01	43006325769.289500
2010-10-01	47253425631.539700
2011-01-01	48336215483.311500
2011-04-01	54082476067.353200
2011-07-01	51124416113.118400
2011-10-01	49458488596.206300
2012-01-01	49171208438.905800
2012-04-01	47085427343.715000
2012-07-01	45703190502.698200
2012-10-01	50104623443.356895
2013-01-01	48535707206.896200
2013-04-01	47204927401.259200
2013-07-01	49870209944.369896
2013-10-01	52981739861.235400
2014-01-01	54105144411.175600
2014-04-01	54868222536.365800
2014-07-01	53162576950.501700
2014-10-01	52779685596.242300
2015-01-01	46168663230.466805
2015-04-01	47086096247.822495
2015-07-01	47602012520.744700
2015-10-01	47671593397.078896
2016-01-01	46201763179.301506
2016-04-01	48743875867.319300
2016-07-01	48610400527.815900
2016-10-01	49464118110.286606
2017-01-01	52174098161.501495
2017-04-01	54259890774.551506
2017-07-01	57416396913.896996
2017-10-01	62660192652.159800
2018-01-01	65662399930.490890
2018-04-01	63040837221.781600