Quarter	US Dollars, sum over component sub-periods
2008-01-01	42166466061.9205000
2008-04-01	65850514516.6393050
2008-07-01	-1260811522.4957402
2008-10-01	1693967267.3417199
2009-01-01	84730287225.6810000
2009-04-01	-55102434109.8326950
2009-07-01	56771857709.7808000
2009-10-01	-58488021331.1606000
2010-01-01	7642912442.1146200
2010-04-01	82016387406.6323100
2010-07-01	15121937742.4240990
2010-10-01	-165904893508.6340000
2011-01-01	18346429203.5028000
2011-04-01	-4091584564.7259097
2011-07-01	-21371331410.0813980
2011-10-01	-57234352702.6499000
2012-01-01	27787878457.9089000
2012-04-01	-34578959497.8281000
2012-07-01	-62612397601.5403000
2012-10-01	-8875719498.0099500
2013-01-01	42821218469.8328000
2013-04-01	-150335383294.3540000
2013-07-01	2736839073.1601200
2013-10-01	-18214421391.8830000
2014-01-01	-97996714121.9142900
2014-04-01	46597221384.6629940
2014-07-01	-11729198719.0803000
2014-10-01	-23818434532.2873000
2015-01-01	-66887801614.2793050
2015-04-01	-50623256932.6977000
2015-07-01	-35678511576.9861000
2015-10-01	-47786816802.1070000
2016-01-01	-111712694415.4200000
2016-04-01	-55983826570.6580000
2016-07-01	131030148815.4870000
2016-10-01	-216443219923.5130000
2017-01-01	101201986841.0310000
2017-04-01	-38034845556.3740000
2017-07-01	38445433009.1407000
2017-10-01	-4672223329.4738700