Quarter	US Dollars, sum over component sub-periods
2006-01-01	1485329890208.94000000
2006-04-01	416493213955.57100000
2006-07-01	718444286850.68900000
2006-10-01	607996318549.12600000
2007-01-01	1995963223513.25000000
2007-04-01	1211888406094.97000000
2007-07-01	916410570238.50200000
2007-10-01	857571007531.80990000
2008-01-01	1554693899774.61000000
2008-04-01	-959901586515.68490000
2008-07-01	225690335941.53900000
2008-10-01	-1908564793419.91000000
2009-01-01	-724932602451.16600000
2009-04-01	-618654414185.89100000
2009-07-01	-146786390965.49200000
2009-10-01	-479886482872.98300000
2010-01-01	475867064636.71497000
2010-04-01	463519753237.48700000
2010-07-01	582539850456.80100000
2010-10-01	-88208694125.75440000
2011-01-01	719876848472.56200000
2011-04-01	22833138681.71740000
2011-07-01	1081237592863.32000000
2011-10-01	-508047499708.23400000
2012-01-01	611250159304.54400000
2012-04-01	-120194333743.09800000
2012-07-01	-5261472100.17167000
2012-10-01	-651105094094.12100000
2013-01-01	108608380530.36900000
2013-04-01	-8521808671.88772000
2013-07-01	-486742924895.18200000
2013-10-01	-365679682778.07200000
2014-01-01	589410652239.76200000
2014-04-01	258463465233.21600000
2014-07-01	199945836925.95798000
2014-10-01	-221727867582.89697000
2015-01-01	653787577260.26310000
2015-04-01	-724484562109.44800000
2015-07-01	334219854084.16200000
2015-10-01	-539457889393.60990000
2016-01-01	679049599066.87210000
2016-04-01	816006680858.22690000
2016-07-01	28277915269.89579800
2016-10-01	-299022090386.48400000
2017-01-01	953692999504.13100000
2017-04-01	62906869026.21790000
2017-07-01	323741303520.91800000
2017-10-01	-174949463.64807898
2018-01-01	839977623588.81800000
2018-04-01	14553229231.17630000