Quarter	US Dollars, sum over component sub-periods
1999-01-01	5492077706.0434600
1999-04-01	6834743320.6029100
1999-07-01	7161457551.3031210
1999-10-01	8814545564.8107300
2000-01-01	22494423956.6830980
2000-04-01	3626822676.4364900
2000-07-01	15494375643.3451000
2000-10-01	10885463004.9916000
2001-01-01	10923063823.7889000
2001-04-01	607558769.4222720
2001-07-01	7640495072.0029700
2001-10-01	8851601184.2951900
2002-01-01	11298787853.9151000
2002-04-01	2138011868.2675302
2002-07-01	4773052272.2916800
2002-10-01	2332988969.0186000
2003-01-01	5154738196.6923400
2003-04-01	-2518271550.5235400
2003-07-01	5192880974.5895400
2003-10-01	918723539.0705790
2004-01-01	5141741244.9783190
2004-04-01	18013609930.4899000
2004-07-01	12295731667.1915000
2004-10-01	2363072878.4654100
2005-01-01	7762503103.1820900
2005-04-01	4948087517.7870010
2005-07-01	4163619954.9362900
2005-10-01	13389689090.2727000
2006-01-01	14901014902.4416000
2006-04-01	12382580090.0409000
2006-07-01	-2409654649.3632400
2006-10-01	18032857960.4683000
2007-01-01	11733301999.9382000
2007-04-01	4205601116.7578100
2007-07-01	8368867295.7375800
2007-10-01	23065444525.8065000
2008-01-01	20681255585.4072000
2008-04-01	19409977646.1564000
2008-07-01	11494040585.5397000
2008-10-01	-5442216894.7142500
2009-01-01	11729829147.2740000
2009-04-01	-53792003.6629695
2009-07-01	-9684969996.9092310
2009-10-01	42743899054.8520050
2010-01-01	-6462198412.6199700
2010-04-01	44015562883.8532000
2010-07-01	-23246293322.8902000
2010-10-01	65328102791.5378000
2011-01-01	31398470132.2326000
2011-04-01	2300716533.2253300
2011-07-01	71005560644.3000000
2011-10-01	13045230547.5924000
2012-01-01	19461599788.8117030
2012-04-01	30624130539.8273000
2012-07-01	5235764742.9679500
2012-10-01	-25265121013.7312000
2013-01-01	-34768817198.6709000
2013-04-01	-7951379819.7686000
2013-07-01	-10833425450.0825000
2013-10-01	18909952562.8650000
2014-01-01	12106244737.3068000
2014-04-01	8109892556.1184200
2014-07-01	4653711209.7697500
2014-10-01	-9471955425.8366410
2015-01-01	27520710609.6225000
2015-04-01	8535370389.1724710
2015-07-01	-7342761496.7540810
2015-10-01	-39761522191.8306960
2016-01-01	57647117391.0352000
2016-04-01	-10334597793.4098000
2016-07-01	3777227189.6110500
2016-10-01	-39237497581.4350000
2017-01-01	59585952982.2972000
2017-04-01	-18754496329.9302000
2017-07-01	16752933906.2912980
2017-10-01	-14410459903.7812000
2018-01-01	18780936629.7312000
2018-04-01	2251381967.0454500