Quarter	US Dollars, sum over component sub-periods
1999-01-01	15136973014.0814000
1999-04-01	-37772479436.5276950
1999-07-01	737213492.0510900
1999-10-01	1735342900.3819199
2000-01-01	-46637381972.4618000
2000-04-01	-27576590486.2738000
2000-07-01	12295516978.1143000
2000-10-01	-10246041827.1499000
2001-01-01	-32962578822.9113000
2001-04-01	-14455407338.6346020
2001-07-01	50096009982.6567000
2001-10-01	21986815938.1625020
2002-01-01	-20343937009.8152000
2002-04-01	-25209393670.6172000
2002-07-01	42451067724.0731050
2002-10-01	16558729116.2686020
2003-01-01	-5191560055.6478200
2003-04-01	23942321940.4308970
2003-07-01	-10867092891.8510990
2003-10-01	-5930472890.4646600
2004-01-01	13312845563.4161000
2004-04-01	11340161637.6274000
2004-07-01	23213750590.0022000
2004-10-01	41068139165.6556000
2005-01-01	3468784622.9632800
2005-04-01	-2798928361.6650000
2005-07-01	14640108241.7580000
2005-10-01	15535412367.9498000
2006-01-01	-27189095534.2349000
2006-04-01	-21199880060.3666000
2006-07-01	7750507734.4641100
2006-10-01	38459777750.3091000
2007-01-01	4566614616.6413100
2007-04-01	9379931586.4989600
2007-07-01	-21679037213.6011000
2007-10-01	-16849798895.9301000
2008-01-01	-62614583793.1704000
2008-04-01	-93754726685.5766900
2008-07-01	-47397997295.3510000
2008-10-01	-119227851847.9040000
2009-01-01	-32935012093.9365000
2009-04-01	-13299562222.0901010
2009-07-01	42024418972.8088000
2009-10-01	32551985281.6861000
2010-01-01	-27772231721.9021000
2010-04-01	-25534444679.7568000
2010-07-01	39108909340.1214000
2010-10-01	-3796425186.4303703
2011-01-01	-10792878029.0024010
2011-04-01	-35465721673.5724000
2011-07-01	8957500755.1913300
2011-10-01	-4334353064.0038900
2012-01-01	-7638968394.6192400
2012-04-01	10747401221.6427000
2012-07-01	62453522276.4244000
2012-10-01	116200141521.5760000
2013-01-01	57927136665.0924000
2013-04-01	103819947668.9200000
2013-07-01	83921759569.5381000
2013-10-01	195684593684.4430200
2014-01-01	42906005998.8524000
2014-04-01	50809213229.4911000
2014-07-01	111251976477.4160000
2014-10-01	127009460044.4580000
2015-01-01	37458651185.6337050
2015-04-01	42790774862.8100050
2015-07-01	84913672769.8819000
2015-10-01	130110214391.5360100
2016-01-01	65519660351.0611950
2016-04-01	87756002285.5165000
2016-07-01	125992007312.1990000
2016-10-01	102036888877.3620000
2017-01-01	52842042102.0226000
2017-04-01	121143730383.5570000
2017-07-01	136688390419.8040000
2017-10-01	140451939565.5510000
2018-01-01	154084048959.9870000
2018-04-01	99875592404.7400000