Quarter	US Dollars, sum over component sub-periods
1998-01-01	12662200000.00000000
1998-04-01	10604074000.00000000
1998-07-01	7309669000.00000000
1998-10-01	13084098000.00000000
1999-01-01	652524000.00000000
1999-04-01	5449798000.00000000
1999-07-01	11152160000.00000000
1999-10-01	3285039100.00000000
2000-01-01	8554626553.00000000
2000-04-01	10631631230.00000000
2000-07-01	15104064820.00000000
2000-10-01	-2755674573.00000000
2001-01-01	-1218732418.00000000
2001-04-01	-9463584161.00000000
2001-07-01	-858529454.00000000
2001-10-01	-5338156805.00000000
2002-01-01	-6110023642.00000000
2002-04-01	9548778773.00000000
2002-07-01	-4150030585.00000050
2002-10-01	4817891041.00000000
2003-01-01	-16086820280.00000000
2003-04-01	-5707940785.00000000
2003-07-01	-5455326342.00000000
2003-10-01	33210973350.00000000
2004-01-01	-7486248633.00000000
2004-04-01	-1152161531.00000000
2004-07-01	-2177172073.00000000
2004-10-01	-17517672030.00000000
2005-01-01	-9850336750.00000000
2005-04-01	-4783443218.00000000
2005-07-01	-475273632.29999995
2005-10-01	9531088672.00000000
2006-01-01	-21552897010.00000000
2006-04-01	-16969866610.00000000
2006-07-01	-1158963655.00000000
2006-10-01	26129795160.00000000
2007-01-01	-36361227850.00000000
2007-04-01	-15282386580.00000000
2007-07-01	32530307000.00000000
2007-10-01	83518356610.00000000
2008-01-01	-30449652940.00000000
2008-04-01	16160141280.00000000
2008-07-01	56901217920.00000000
2008-10-01	69958311260.00000000
2009-01-01	4813301592.00000000
2009-04-01	-68319345140.00001000
2009-07-01	4999834524.00000000
2009-10-01	-21770183510.00000000
2010-01-01	-25191282690.00000000
2010-04-01	-11266379180.00000000
2010-07-01	25392754390.00000000
2010-10-01	-61380989560.00000000
2011-01-01	-43769607000.00000000
2011-04-01	-39899812860.00000000
2011-07-01	-17299602690.00000000
2011-10-01	92235597340.00000000
2012-01-01	11609345440.00000000
2012-04-01	73377295520.00000000
2012-07-01	98263416330.00000000
2012-10-01	76817790510.00000000
2013-01-01	-50267125410.00000000
2013-04-01	30375838110.00000000
2013-07-01	-22967834890.00000000
2013-10-01	-29340460600.00000000
2014-01-01	-17407335290.00000000
2014-04-01	74511299200.00000000
2014-07-01	90012535590.00000000
2014-10-01	131641610400.00000000
2015-01-01	128206275000.00000000
2015-04-01	64656693710.00000000
2015-07-01	110924073300.00000000
2015-10-01	130216573800.00000000
2016-01-01	71409094520.00000000
2016-04-01	37131212640.00000000
2016-07-01	95173160590.00000000
2016-10-01	113027261900.00000000
2017-01-01	-32218453440.00000000
2017-04-01	-40960388920.00000000
2017-07-01	3105134621.00000000
2017-10-01	-4326276521.00000000
2018-01-01	-33632156960.00000000
2018-04-01	53936887310.00000000