Quarter	US Dollars, sum over component sub-periods
2005-01-01	19122528594.3937000
2005-04-01	3619685080.5743003
2005-07-01	4296386956.9748110
2005-10-01	-4422192758.0886710
2006-01-01	12039448238.0072000
2006-04-01	7112394420.0780200
2006-07-01	9133483618.6443210
2006-10-01	7382874347.3796300
2007-01-01	14474707522.4725000
2007-04-01	2810686911.4212600
2007-07-01	15303702703.2470000
2007-10-01	24283659256.2924000
2008-01-01	11914660439.9723000
2008-04-01	20338557761.1324000
2008-07-01	1148488295.8670201
2008-10-01	-2985992784.9867000
2009-01-01	-4231060205.2692804
2009-04-01	-7115771704.1130200
2009-07-01	-19288919443.4097020
2009-10-01	6420351247.1565600
2010-01-01	27934420387.3966000
2010-04-01	-8453347207.5559610
2010-07-01	31971217196.0691000
2010-10-01	-29856440379.6053000
2011-01-01	-10951003511.4056020
2011-04-01	-18321448361.0327000
2011-07-01	2724563650.0566900
2011-10-01	7418548548.1508300
2012-01-01	16746955429.4629020
2012-04-01	13803753071.6254000
2012-07-01	-17987884916.1041000
2012-10-01	-13059453711.0497000
2013-01-01	6054583421.4199000
2013-04-01	-14295069939.3163000
2013-07-01	-3250035925.6297400
2013-10-01	2621232957.4563003
2014-01-01	-5284888910.4118595
2014-04-01	-13888255066.9373000
2014-07-01	-14542863352.5626980
2014-10-01	-2151980560.1645800
2015-01-01	22494500107.5203000
2015-04-01	-34432855516.2201000
2015-07-01	-6835667415.2750010
2015-10-01	-12201017173.2083000
2016-01-01	17734870447.4202000
2016-04-01	-5878185971.7170600
2016-07-01	-757785176.2642890
2016-10-01	-6120734318.7814100
2017-01-01	16052879534.3515990
2017-04-01	-10613643155.4966010
2017-07-01	-4996722903.6880500
2017-10-01	14355359753.1155990
2018-01-01	-1946475613.4440598
2018-04-01	5731646314.1994600
2018-07-01	-4765683845.4037000