Quarter	US Dollars, sum over component sub-periods
2005-01-01	18653067785.3861000
2005-04-01	9856406497.0805990
2005-07-01	14474215052.5949000
2005-10-01	6592037532.7127500
2006-01-01	17293825121.2072000
2006-04-01	4662545135.0569510
2006-07-01	13452339215.6862980
2006-10-01	5971324455.1437300
2007-01-01	17682905910.1647000
2007-04-01	10261429095.1135000
2007-07-01	973785933.8368720
2007-10-01	-11130575476.1431000
2008-01-01	21932123187.2631000
2008-04-01	18696423647.1650000
2008-07-01	22307655729.2353000
2008-10-01	12377347146.4692000
2009-01-01	16288791607.8255000
2009-04-01	11892949061.8382020
2009-07-01	9127421436.8365500
2009-10-01	696131632.4122219
2010-01-01	16197521117.5425000
2010-04-01	19703859012.6140980
2010-07-01	5037273580.0511600
2010-10-01	2009553729.2833800
2011-01-01	10463410463.2987000
2011-04-01	23175496968.2139000
2011-07-01	29732568925.9265000
2011-10-01	16139246955.3092000
2012-01-01	22413819848.4663000
2012-04-01	19688494027.1139000
2012-07-01	5393545945.3004290
2012-10-01	-639610551.6179711
2013-01-01	20811550884.7528000
2013-04-01	10065594913.3729000
2013-07-01	5179560178.9514600
2013-10-01	16853111988.6038000
2014-01-01	25269002132.1059000
2014-04-01	14925734940.7596000
2014-07-01	3425423343.6743800
2014-10-01	11829411095.7941990
2015-01-01	6601910464.6982990
2015-04-01	4077043753.9601398
2015-07-01	3859971019.6339100
2015-10-01	-4588767967.5896200
2016-01-01	3581287120.8104000
2016-04-01	22144083299.5101000
2016-07-01	571018645.6681860
2016-10-01	12400630325.7400000
2017-01-01	4246381673.1160994
2017-04-01	5565260998.8259100
2017-07-01	-2041218098.2745101
2017-10-01	4189135398.6126094
2018-01-01	11016846107.3013000
2018-04-01	17397914309.6098020