Quarter	US Dollars, sum over component sub-periods
1999-01-01	7557822714.4093490000
1999-04-01	5214005526.5171200000
1999-07-01	9684447509.3766900000
1999-10-01	-2113132861.9483101000
2000-01-01	4887945937.5867100000
2000-04-01	5031754192.1515610000
2000-07-01	2392953767.3119800000
2000-10-01	1592901275.2324100000
2001-01-01	457634190.6780500000
2001-04-01	1112357706.7086902000
2001-07-01	1454823002.8595102000
2001-10-01	-1361412751.5890100000
2002-01-01	-3358366987.7451596000
2002-04-01	4010439054.3742604000
2002-07-01	543979618.8486251000
2002-10-01	-6495031685.2646900000
2003-01-01	8405689668.2635310000
2003-04-01	-812162453.1458421000
2003-07-01	5297341946.2452000000
2003-10-01	-7446408376.5104090000
2004-01-01	9544893969.0752200000
2004-04-01	3997801695.3991000000
2004-07-01	9068597288.8468400000
2004-10-01	-1616662072.3192800000
2005-01-01	17142112449.1812000000
2005-04-01	17621670377.7128000000
2005-07-01	9466985446.1280500000
2005-10-01	181971986.8547170000
2006-01-01	22815359686.6714000000
2006-04-01	2024841808.1016600000
2006-07-01	9755366913.2689190000
2006-10-01	15551082658.8988000000
2007-01-01	-6259264478.8531800000
2007-04-01	21129785525.5510980000
2007-07-01	-346468631.2675980300
2007-10-01	2228671370.9959197000
2008-01-01	18564288464.1249000000
2008-04-01	30377343716.3347000000
2008-07-01	-1133629218.1114700000
2008-10-01	-25416362513.3360000000
2009-01-01	-7470681814.1496100000
2009-04-01	-10556850946.7175000000
2009-07-01	4098164006.8449297000
2009-10-01	-19418372639.0025000000
2010-01-01	19846006345.5665000000
2010-04-01	1705261247.0880098000
2010-07-01	-9201488153.5147800000
2010-10-01	-18758168064.5219000000
2011-01-01	21472276342.2198000000
2011-04-01	-5863696688.3703590000
2011-07-01	4509813589.5462000000
2011-10-01	6736638.2716877395
2012-01-01	12281362921.1346000000
2012-04-01	897647160.8578760000
2012-07-01	-1280128900.3743200000
2012-10-01	-14515933065.1227990000
2013-01-01	-559465751.2584940000
2013-04-01	1938118629.5906300000
2013-07-01	-10549164928.5277000000
2013-10-01	-7080513440.7272500000
2014-01-01	1375974383.4557100000
2014-04-01	2745258005.7064500000
2014-07-01	-4508675952.2004310000
2014-10-01	-11201575591.9191990000
2015-01-01	7803557325.8846900000
2015-04-01	-5745917995.5618800000
2015-07-01	2334564593.9717703000
2015-10-01	-6704613784.3831700000
2016-01-01	8477614510.5026810000
2016-04-01	-2600587709.5960100000
2016-07-01	2079985666.5982200000
2016-10-01	-12325627758.7267000000
2017-01-01	22851937547.5384000000
2017-04-01	5827718058.5410300000
2017-07-01	-9607333101.0560000000
2017-10-01	-6145464147.5595700000
2018-01-01	12593537825.1316000000
2018-04-01	-194166804.5652949800