Quarter	US Dollars, sum over component sub-periods
2008-01-01	300391906892.965000
2008-04-01	250367990242.615000
2008-07-01	197726149736.192000
2008-10-01	-124553528589.588000
2009-01-01	725188004.627921
2009-04-01	159838623831.284000
2009-07-01	317657399264.743040
2009-10-01	245750718986.625980
2010-01-01	176713766321.359000
2010-04-01	158777701323.572000
2010-07-01	219200314706.536000
2010-10-01	229480841741.466000
2011-01-01	271846408452.607000
2011-04-01	266274640206.880980
2011-07-01	168545635253.318000
2011-10-01	147251521164.024000
2012-01-01	138876257131.082000
2012-04-01	31560303642.197700
2012-07-01	40909846278.967400
2012-10-01	104646529611.622000
2013-01-01	203752371448.097000
2013-04-01	68918104032.348100
2013-07-01	122161191263.606000
2013-10-01	179918170773.321000
2014-01-01	142896888357.796020
2014-04-01	74470564923.272900
2014-07-01	28422931721.465200
2014-10-01	-89138614926.800310
2015-01-01	-56796855638.021500
2015-04-01	676480222.597813
2015-07-01	-180507270282.167020
2015-10-01	-150246418966.031000
2016-01-01	-139821609712.399000
2016-04-01	-16632593285.291400
2016-07-01	-91925155094.244200
2016-10-01	-129100854646.201000
2017-01-01	40531014485.930305
2017-04-01	48550488580.121600
2017-07-01	56929851468.900200
2017-10-01	62646574661.136900