Quarter	US Dollars, sum over component sub-periods
2008-01-01	499934116571.24300
2008-04-01	708595661750.52890
2008-07-01	52489056518.43720
2008-10-01	-65890802337.24370
2009-01-01	293118282096.85803
2009-04-01	418567047652.40300
2009-07-01	366327178526.07000
2009-10-01	440158168705.61800
2010-01-01	483350217358.19300
2010-04-01	450215675341.08000
2010-07-01	645174226758.09610
2010-10-01	376258862198.53600
2011-01-01	601270428736.43090
2011-04-01	592819983732.70900
2011-07-01	194267010562.18298
2011-10-01	87779390979.86710
2012-01-01	336492578376.77400
2012-04-01	229548325835.75400
2012-07-01	268800467355.91400
2012-10-01	698961608709.98790
2013-01-01	507483118970.95600
2013-04-01	277842562611.49603
2013-07-01	362465690092.65700
2013-10-01	598571363913.50800
2014-01-01	355060911447.23600
2014-04-01	657465916297.90810
2014-07-01	424264137298.56000
2014-10-01	327385935436.96200
2015-01-01	726411230128.24000
2015-04-01	535853442130.81000
2015-07-01	-255567171042.89900
2015-10-01	163063248877.30502
2016-01-01	-155546201433.32000
2016-04-01	178859669175.60000
2016-07-01	329671341952.55096
2016-10-01	134180082293.02501
2017-01-01	395666861820.42600
2017-04-01	523465191920.19196
2017-07-01	591110472831.39310
2017-10-01	321930169845.05005