Quarter	US Dollars, sum over component sub-periods
2002-01-01	-3822016243.76666980
2002-04-01	-325543550.84808200
2002-07-01	-2017249555.82799000
2002-10-01	3667111697.34584000
2003-01-01	-491351744.72084500
2003-04-01	303510220.25253600
2003-07-01	-28141425.55378880
2003-10-01	980122495.96222800
2004-01-01	624699871.16527600
2004-04-01	-874526653.65739600
2004-07-01	-2362334747.44249000
2004-10-01	-4116140813.13662960
2005-01-01	1087942952.01516000
2005-04-01	-1921872077.83212020
2005-07-01	3516674730.25886000
2005-10-01	4112804774.79485030
2006-01-01	1834058043.66889000
2006-04-01	-2039673051.63710000
2006-07-01	-4058660883.01719000
2006-10-01	-7650807612.36948000
2007-01-01	393334592.30329996
2007-04-01	-2463883437.86205000
2007-07-01	1773451934.41299000
2007-10-01	-3379233834.30590000
2008-01-01	-14214992248.21380000
2008-04-01	-16243842099.35539800
2008-07-01	-631293519.60969300
2008-10-01	181245247.35636398
2009-01-01	-7782936017.45784950
2009-04-01	-23103325117.52600000
2009-07-01	4537304094.14034900
2009-10-01	2005334604.08863000
2010-01-01	9936840856.75031900
2010-04-01	-15301606510.75550000
2010-07-01	-7500763657.72469000
2010-10-01	-8943384180.68992000
2011-01-01	-11131949950.86620000
2011-04-01	-7871516246.61205000
2011-07-01	-3717701684.80750000
2011-10-01	-11628784984.58740000
2012-01-01	-612428882.45273600
2012-04-01	-11052601256.33430000
2012-07-01	-2904378472.89229000
2012-10-01	3404138795.69217970
2013-01-01	4564132154.72437000
2013-04-01	-800584043.08561600
2013-07-01	2451846343.88558000
2013-10-01	1970892630.17552000
2014-01-01	-7762469031.76606000
2014-04-01	6213168843.08488000
2014-07-01	-7117986065.54791900
2014-10-01	1377253135.42379000
2015-01-01	4237246072.50865030
2015-04-01	3672078488.02029000
2015-07-01	11089181821.36590000
2015-10-01	6042578311.95754000
2016-01-01	8769680013.00959000
2016-04-01	4783364975.18398000
2016-07-01	-3502722643.48274000
2016-10-01	6286188682.96283100
2017-01-01	-20684594407.94619800
2017-04-01	-4167054863.90111000
2017-07-01	13757982878.45600000
2017-10-01	19085204618.44140000
2018-01-01	16827021217.75240100
2018-04-01	17332067524.08000000