Quarter	US Dollars, sum over component sub-periods
1999-01-01	-697075286.74412690
1999-04-01	-2156827174.62939000
1999-07-01	-2072167653.33279000
1999-10-01	-2583294544.88671970
2000-01-01	2930200675.16812000
2000-04-01	0.00000000
2000-07-01	363280745.64177305
2000-10-01	-211285485.74316302
2001-01-01	4517292333.78979000
2001-04-01	-2259667737.27311000
2001-07-01	-234447579.50493300
2001-10-01	4816893275.03006000
2002-01-01	2473847987.31841000
2002-04-01	-6432703780.17609000
2002-07-01	-2223135512.83525040
2002-10-01	-366170917.56113300
2003-01-01	4322005952.03435000
2003-04-01	9543760743.12079000
2003-07-01	-6597475806.83024000
2003-10-01	4614440984.99638100
2004-01-01	8832308564.70418200
2004-04-01	-1219709169.65447020
2004-07-01	-2343872320.71180000
2004-10-01	-3813664375.72753000
2005-01-01	4341550228.89207900
2005-04-01	-6526637807.37171900
2005-07-01	-4814589532.56646900
2005-10-01	849202605.32201410
2006-01-01	6093879483.98150000
2006-04-01	838342325.26617300
2006-07-01	1702792029.80497000
2006-10-01	14538508016.62650000
2007-01-01	18194347124.64300000
2007-04-01	9084702351.45394000
2007-07-01	3437188802.25792030
2007-10-01	2683679700.31498000
2008-01-01	20435549564.25340000
2008-04-01	1146550639.57370000
2008-07-01	-3390391087.50004000
2008-10-01	12651706288.28880100
2009-01-01	5473555972.15733000
2009-04-01	10123791271.65860000
2009-07-01	-2733539761.63374000
2009-10-01	-10602579129.12840000
2010-01-01	-5410534431.12293100
2010-04-01	5791788945.02767900
2010-07-01	-9742980223.22303000
2010-10-01	-5155102916.71883000
2011-01-01	9704566537.85906000
2011-04-01	5630530546.12293000
2011-07-01	-2884642818.86127000
2011-10-01	813785903.21987890
2012-01-01	-8058619877.24210100
2012-04-01	2758341490.00756000
2012-07-01	411693458.67365897
2012-10-01	5901112887.53806000
2013-01-01	5613130438.33404100
2013-04-01	5766033524.01793000
2013-07-01	6877356141.25011100
2013-10-01	-7099569032.45546000
2014-01-01	-6657852146.24286000
2014-04-01	7428103205.25066950
2014-07-01	-10133924709.24960100
2014-10-01	-2062758095.84778020
2015-01-01	-6785897801.56274000
2015-04-01	-2341503059.98162000
2015-07-01	-4057695603.80807970
2015-10-01	-2877939326.41223000
2016-01-01	1541885426.44218000
2016-04-01	-7438155120.75941000
2016-07-01	-10539412350.33269900
2016-10-01	-359888073.38182800
2017-01-01	-7698650041.07828000
2017-04-01	-1401115834.41805000
2017-07-01	7833852296.33784000
2017-10-01	-4734798110.23894000
2018-01-01	4635326373.57496000
2018-04-01	-1265062248.14935000