Quarter	US Dollars, sum over component sub-periods
2004-01-01	2333329321.75162000
2004-04-01	269856810.67188800
2004-07-01	-87012932.65810070
2004-10-01	-1722515123.32719000
2005-01-01	2492647829.05244000
2005-04-01	3878187506.04986000
2005-07-01	10014818.87105070
2005-10-01	1750941609.25432000
2006-01-01	1201770543.45507000
2006-04-01	1271300934.32742000
2006-07-01	1517854614.09539990
2006-10-01	-1512882954.60320000
2007-01-01	1871878432.04279020
2007-04-01	3222410885.41172000
2007-07-01	2011379299.21270010
2007-10-01	5941218001.68421100
2008-01-01	8439765733.69218100
2008-04-01	5868431731.07736000
2008-07-01	-5621856474.78206000
2008-10-01	-10612131252.66400000
2009-01-01	270449454.61415400
2009-04-01	3479646235.22865960
2009-07-01	9248494926.17086000
2009-10-01	1780971730.35199000
2010-01-01	8458444037.03243900
2010-04-01	3490354266.22641000
2010-07-01	7614997083.72641000
2010-10-01	-4399018949.10221000
2011-01-01	10238105561.71740200
2011-04-01	806386449.95528790
2011-07-01	-5243939770.17209000
2011-10-01	514716141.69346195
2012-01-01	960546046.84833800
2012-04-01	4523787016.22374000
2012-07-01	2345826941.05397030
2012-10-01	3387424240.41208030
2013-01-01	2572928998.84630000
2013-04-01	1549997682.09188000
2013-07-01	-2291775615.51029000
2013-10-01	-883533223.20123400
2014-01-01	-4468160255.59732100
2014-04-01	-1428683405.99444990
2014-07-01	4449733906.73564000
2014-10-01	1750549358.28676000
2015-01-01	2436775751.12867000
2015-04-01	5292798131.46610000
2015-07-01	-1114688648.94028000
2015-10-01	-5480736136.61701000
2016-01-01	3641950089.97555970
2016-04-01	10815552854.70950000
2016-07-01	1744146373.81535000
2016-10-01	6458528871.33226000
2017-01-01	-3623919559.91623970
2017-04-01	-3295324980.40048000
2017-07-01	-2387224211.87792000
2017-10-01	1520316574.82860020
2018-01-01	4778697718.76397000
2018-04-01	-6862567884.20916000