Quarter	US Dollars, sum over component sub-periods
2002-01-01	-1582315952.20047000
2002-04-01	1837389871.73579000
2002-07-01	1093861367.37734000
2002-10-01	-3304542460.94105000
2003-01-01	5005840475.49334000
2003-04-01	4450423064.93064000
2003-07-01	-531310114.45553200
2003-10-01	-2266763815.47656000
2004-01-01	3726696649.87731000
2004-04-01	-2185111387.92842000
2004-07-01	8623542763.68299000
2004-10-01	-1334264370.58402010
2005-01-01	-6368830097.31830000
2005-04-01	3279679546.08768030
2005-07-01	3785330777.37749000
2005-10-01	-8678755477.63967900
2006-01-01	-7827254994.52578000
2006-04-01	-4991090515.19036000
2006-07-01	3895009313.68563000
2006-10-01	-4870677514.93048000
2007-01-01	1793605740.90305000
2007-04-01	-7503406037.71964000
2007-07-01	-2069187658.95926980
2007-10-01	-11780948144.47130000
2008-01-01	489913834.86150104
2008-04-01	-24297813622.02840000
2008-07-01	18655398283.76290000
2008-10-01	-13425282017.94750000
2009-01-01	3808200221.18006000
2009-04-01	-3573423230.67422000
2009-07-01	673729580.18288290
2009-10-01	-6816365635.10538000
2010-01-01	-5807675960.97773000
2010-04-01	-19194989864.76270300
2010-07-01	-20655531623.26220000
2010-10-01	-11413707326.66890000
2011-01-01	-18182731809.94470000
2011-04-01	-15042094769.30749900
2011-07-01	-14234010894.24400000
2011-10-01	-5921505040.81353000
2012-01-01	-55988064836.30540000
2012-04-01	-45942864045.79300000
2012-07-01	1611736093.53092000
2012-10-01	-33142010074.56769600
2013-01-01	2041258295.27569000
2013-04-01	-13155437301.79670000
2013-07-01	7817826645.92799000
2013-10-01	1646947570.79584000
2014-01-01	98675453.79363640
2014-04-01	6337953297.88972000
2014-07-01	-2396061926.41909000
2014-10-01	-11368893742.55090000
2015-01-01	643917309.63734010
2015-04-01	-2839224541.79159000
2015-07-01	-6206606727.68782000
2015-10-01	1550585561.03655000
2016-01-01	-5210889418.31210000
2016-04-01	4469442533.46983000
2016-07-01	-4168898310.30631000
2016-10-01	-2621579887.83828970
2017-01-01	-3360767090.59666000
2017-04-01	2252343193.78977970
2017-07-01	12924094553.05869900
2017-10-01	14131388241.97400000
2018-01-01	4911823837.53423000
2018-04-01	480056578.15836800