Quarter	US Dollars, sum over component sub-periods
2008-01-01	822734626173.864000
2008-04-01	-63475167805.805100
2008-07-01	137418803731.191000
2008-10-01	-792925104522.470100
2009-01-01	-210379708207.909000
2009-04-01	-146725656654.583000
2009-07-01	145218477343.143000
2009-10-01	53544648952.661300
2010-01-01	254092811323.179000
2010-04-01	234133258705.715000
2010-07-01	377441296260.035030
2010-10-01	-790910602.836245
2011-01-01	383001423792.205000
2011-04-01	327187942303.498960
2011-07-01	145856746928.077000
2011-10-01	19583676921.327100
2012-01-01	356447641683.942000
2012-04-01	-58311159569.327610
2012-07-01	189288893941.176000
2012-10-01	88948861905.890400
2013-01-01	389593212351.727000
2013-04-01	337134560208.417000
2013-07-01	-4971380071.981080
2013-10-01	463081912387.900000
2014-01-01	344196702839.652040
2014-04-01	302263876490.240970
2014-07-01	297704270421.506040
2014-10-01	159947910960.685000
2015-01-01	432840540100.483000
2015-04-01	65425378179.148100
2015-07-01	135671665002.274000
2015-10-01	326134868964.784000
2016-01-01	362907367807.435000
2016-04-01	391853123260.982000
2016-07-01	349077165287.691000
2016-10-01	-40596775439.432500
2017-01-01	638917200418.116000
2017-04-01	224457876852.212000
2017-07-01	257707901756.334000
2017-10-01	152894885377.714000
2018-01-01	509516131818.111000
2018-04-01	-94244040347.912490