Quarter	US Dollars, sum over component sub-periods
2003-01-01	2294706592.70000000
2003-04-01	1091447262.89999990
2003-07-01	1079529421.45000000
2003-10-01	1564790513.89999990
2004-01-01	3330052041.20000030
2004-04-01	1322287770.27000000
2004-07-01	1679094200.80000000
2004-10-01	2909534163.08000000
2005-01-01	1980270691.18000000
2005-04-01	2257066239.40000000
2005-07-01	2373227460.63000000
2005-10-01	4272333411.93000000
2006-01-01	6187916801.82000000
2006-04-01	4727906265.20000000
2006-07-01	3826873650.30000000
2006-10-01	3369577930.02700000
2007-01-01	5350221635.20000000
2007-04-01	8250689124.63999900
2007-07-01	6803544174.00000000
2007-10-01	5318786232.03000000
2008-01-01	9893540157.28999900
2008-04-01	7762277557.00000000
2008-07-01	5975502388.70000000
2008-10-01	-2088268548.80000020
2009-01-01	3750408264.30000000
2009-04-01	2301813983.60000000
2009-07-01	8097055144.79999900
2009-10-01	10660308919.08000000
2010-01-01	14377580636.30000000
2010-04-01	3178855420.70000030
2010-07-01	10543274336.91000000
2010-10-01	7410840027.80999900
2011-01-01	11452778663.40000000
2011-04-01	5262696706.70000000
2011-07-01	2661027540.70000000
2011-10-01	16023372199.10000000
2012-01-01	5271002142.70000000
2012-04-01	8816462703.50000000
2012-07-01	5992354348.90000100
2012-10-01	13176775449.60000000
2013-01-01	9131180759.02999900
2013-04-01	-1151017399.30000020
2013-07-01	3561699578.79999970
2013-10-01	9257730962.19999900
2014-01-01	4075722732.70000030
2014-04-01	5297077101.61000000
2014-07-01	8096458406.59999900
2014-10-01	10719611549.69999900
2015-01-01	3706067114.10000000
2015-04-01	3804835646.30000000
2015-07-01	6258901483.10000000
2015-10-01	1432370295.70000000
2016-01-01	5582738576.80000000
2016-04-01	3258547691.60000000
2016-07-01	-587562087.02000000
2016-10-01	5303672855.40000100
2017-01-01	-442925198.59999996
2017-04-01	4525649621.25000000
2017-07-01	4669628471.37999900
2017-10-01	8366980390.48000000
2018-01-01	6682406533.09000000
2018-04-01	-2362303671.10000000