Quarter	US Dollars, sum over component sub-periods
2002-01-01	44144423493.052200
2002-04-01	44852360467.552300
2002-07-01	-26566469378.381200
2002-10-01	111622101836.873000
2003-01-01	39883548219.071100
2003-04-01	61357453470.739800
2003-07-01	46254372697.229400
2003-10-01	71308462957.416990
2004-01-01	68882005606.034800
2004-04-01	48575038206.110900
2004-07-01	58355940596.209000
2004-10-01	127917091069.961000
2005-01-01	122607842126.584000
2005-04-01	149624367319.403000
2005-07-01	137882868667.586000
2005-10-01	181291673282.947020
2006-01-01	186558599101.889980
2006-04-01	88748653054.039700
2006-07-01	127225075161.027000
2006-10-01	154743333707.266000
2007-01-01	164975016934.465000
2007-04-01	138519130541.466980
2007-07-01	164303124250.012020
2007-10-01	216523103769.149000
2008-01-01	91185399789.527600
2008-04-01	33556131933.681396
2008-07-01	34245799051.891100
2008-10-01	-110684371166.359000
2009-01-01	38032561962.943504
2009-04-01	102180294147.846000
2009-07-01	130551913639.345000
2009-10-01	152369989534.817000
2010-01-01	158213159637.453000
2010-04-01	95668713883.762390
2010-07-01	109203054630.899000
2010-10-01	172360689568.840970
2011-01-01	191514110705.918000
2011-04-01	174414031589.769000
2011-07-01	125509495921.967000
2011-10-01	143905372104.485000
2012-01-01	276880802591.030000
2012-04-01	200031693325.569000
2012-07-01	185454763979.547000
2012-10-01	316054106334.318000
2013-01-01	176087886724.522000
2013-04-01	357252466665.342000
2013-07-01	149472553745.587000
2013-10-01	274606049054.241000
2014-01-01	226860350241.225000
2014-04-01	149349166050.705020
2014-07-01	187816022722.112000
2014-10-01	140399906666.657000
2015-01-01	549071216824.622000
2015-04-01	127004143537.321000
2015-07-01	369387038729.897000
2015-10-01	164596244000.617000
2016-01-01	75630637407.659210
2016-04-01	132258460659.454000
2016-07-01	193331543268.317020
2016-10-01	52891694185.909600
2017-01-01	194808345530.803000
2017-04-01	246269753103.400000
2017-07-01	-150371205899.914980
2017-10-01	-5247018248.998930
2018-01-01	84273969259.550300
2018-04-01	75155656648.058990