Quarter	US Dollars, sum over component sub-periods
2006-01-01	-24273666877.339100
2006-04-01	-18385182056.599102
2006-07-01	-25109324754.797200
2006-10-01	-21207490148.646000
2007-01-01	-37331175853.469505
2007-04-01	-20571811479.521500
2007-07-01	-24959899535.642998
2007-10-01	-27258958859.172100
2008-01-01	-32600174142.062600
2008-04-01	-22428541211.535698
2008-07-01	-30539338581.746800
2008-10-01	-29001428856.243800
2009-01-01	-33174945264.827800
2009-04-01	-28716410233.972000
2009-07-01	-35929201116.413500
2009-10-01	-36346726394.332504
2010-01-01	-40726719861.211105
2010-04-01	-25470474645.586500
2010-07-01	-33029522837.752300
2010-10-01	-33752516434.812400
2011-01-01	-38794098472.213800
2011-04-01	-30816607424.258000
2011-07-01	-36489236815.246400
2011-10-01	-42422767105.832794
2012-01-01	-42279247177.208300
2012-04-01	-33880935532.678800
2012-07-01	-38426189396.424194
2012-10-01	-40841394663.377800
2013-01-01	-41840765274.316400
2013-04-01	-37564165547.250800
2013-07-01	-45170926960.891100
2013-10-01	-47886261603.072200
2014-01-01	-43793213580.332500
2014-04-01	-31628761219.954100
2014-07-01	-49392806146.329200
2014-10-01	-49788344456.367100
2015-01-01	-50585451461.021000
2015-04-01	-37148389135.008804
2015-07-01	-51151735711.458100
2015-10-01	-54141788846.196800
2016-01-01	-55918702695.466400
2016-04-01	-42186790368.795200
2016-07-01	-54729198575.042500
2016-10-01	-54836898959.892500
2017-01-01	-55280777150.422195
2017-04-01	-55357299164.200096
2017-07-01	-53393379072.649300
2017-10-01	-56202107216.347800