Quarter	US Dollars, sum over component sub-periods
1999-01-01	75972226219.20970000
1999-04-01	20141658965.42690300
1999-07-01	-23705136540.27720000
1999-10-01	-2015571718.02732000
2000-01-01	16667984500.96469900
2000-04-01	-17965080808.16990000
2000-07-01	30066451960.81450000
2000-10-01	20173851194.29160000
2001-01-01	57892570419.92930600
2001-04-01	7586401892.88676000
2001-07-01	-22069272721.68680200
2001-10-01	10335093250.38520000
2002-01-01	39798971872.52160000
2002-04-01	-9242126231.70403000
2002-07-01	-16426610587.98050000
2002-10-01	42014611155.68249500
2003-01-01	27736628858.10020000
2003-04-01	18450286330.69640000
2003-07-01	-15389982806.85600000
2003-10-01	29163314621.26780000
2004-01-01	70754730054.71520000
2004-04-01	50845722075.30950000
2004-07-01	-8632101504.55152000
2004-10-01	93616133527.53980000
2005-01-01	49513067400.61260000
2005-04-01	71957880816.06110000
2005-07-01	13015733049.91940000
2005-10-01	188746577947.03400000
2006-01-01	123541197126.59900000
2006-04-01	55941439599.62040000
2006-07-01	144706733455.04300000
2006-10-01	52304317413.37820400
2007-01-01	196572895849.49700000
2007-04-01	98758897398.00620000
2007-07-01	49796616491.59180000
2007-10-01	144447755705.45200000
2008-01-01	214705112679.91400000
2008-04-01	-14306890065.19820000
2008-07-01	-53641955052.25069400
2008-10-01	-81757367014.01210000
2009-01-01	-158087797839.05900000
2009-04-01	-84729895795.00339000
2009-07-01	64876868597.01630000
2009-10-01	-40251406950.10880000
2010-01-01	79011791683.55190000
2010-04-01	-117500378180.49800000
2010-07-01	129402388878.01100000
2010-10-01	58176110087.80560000
2011-01-01	20697059488.60390000
2011-04-01	27982815664.03940200
2011-07-01	451828537.46236205
2011-10-01	-216337706801.67200000
2012-01-01	43276559.14548240
2012-04-01	-41521310602.02450600
2012-07-01	-19181911939.23560000
2012-10-01	1962279016.04520000
2013-01-01	36086860450.86920000
2013-04-01	9776789798.59530000
2013-07-01	-27088199747.41230000
2013-10-01	-125045515147.94499000
2014-01-01	81466180553.54340000
2014-04-01	63775826467.23340000
2014-07-01	7710047801.92676100
2014-10-01	-31390882887.17510000
2015-01-01	129375595677.23900000
2015-04-01	-46177493034.59250000
2015-07-01	17116805263.51590000
2015-10-01	-82882464053.65590000
2016-01-01	127777004145.81900000
2016-04-01	77847119458.02841000
2016-07-01	55021423416.64450000
2016-10-01	-17327425473.21310000
2017-01-01	174620300731.04300000
2017-04-01	15705914624.27330000
2017-07-01	64889431112.49910000
2017-10-01	-53869073351.70630000
2018-01-01	198640693618.81000000
2018-04-01	128260873300.36200000