Quarter	US Dollars, sum over component sub-periods
2006-01-01	890470080396.11300
2006-04-01	463249809565.42000
2006-07-01	610322131696.36600
2006-10-01	703324520139.05800
2007-01-01	818070089921.32410
2007-04-01	855482487237.22600
2007-07-01	361971380190.28500
2007-10-01	288270938232.31600
2008-01-01	267254637949.61298
2008-04-01	351804721922.63500
2008-07-01	-345017171027.00000
2008-10-01	-779626307039.70600
2009-01-01	363882515988.51900
2009-04-01	488519717692.41900
2009-07-01	492677912570.12300
2009-10-01	171142559355.72100
2010-01-01	374463157570.08500
2010-04-01	-128092273686.62200
2010-07-01	526423854925.72400
2010-10-01	133173239414.37900
2011-01-01	325386707235.03796
2011-04-01	224275450402.44300
2011-07-01	-417535179365.92100
2011-10-01	-337526075212.08496
2012-01-01	412320656762.06200
2012-04-01	-65291526798.20530
2012-07-01	423509836651.96800
2012-10-01	426102419540.88000
2013-01-01	375372124903.18695
2013-04-01	198829914218.51600
2013-07-01	215842607784.64400
2013-10-01	382663045244.08500
2014-01-01	612816816656.70300
2014-04-01	804678270180.93090
2014-07-01	476608842672.44100
2014-10-01	434850255515.29100
2015-01-01	805286569998.38000
2015-04-01	347294291101.36000
2015-07-01	149031474864.47600
2015-10-01	181484562057.34702
2016-01-01	264462878010.72897
2016-04-01	344815726727.18097
2016-07-01	283616025308.46500
2016-10-01	-10099180675.40340
2017-01-01	625583947874.63000
2017-04-01	644457153061.26890
2017-07-01	582145658301.89000
2017-10-01	362789347542.92300
2018-01-01	817411340039.52490
2018-04-01	1692004590.30511