Quarter	US Dollars, sum over component sub-periods
1999-01-01	-2806373469.22543000
1999-04-01	-244849023.20511100
1999-07-01	-552018751.37367500
1999-10-01	4900164136.10834000
2000-01-01	1725145774.86145000
2000-04-01	-939484914.12480900
2000-07-01	-7198923074.45645000
2000-10-01	-1908090528.65585000
2001-01-01	-3219954762.19219000
2001-04-01	-306182356.97621800
2001-07-01	1862922249.61752000
2001-10-01	1098355563.99579000
2002-01-01	-379580502.66083400
2002-04-01	741761096.36741010
2002-07-01	-1526093997.61620020
2002-10-01	4006670193.02957960
2003-01-01	-2218007078.36517000
2003-04-01	-6220937212.78858000
2003-07-01	8710334037.40870900
2003-10-01	-10233159.48194140
2004-01-01	-2598436426.28982970
2004-04-01	3968875786.23733000
2004-07-01	-3597483322.49886040
2004-10-01	4838068515.78368950
2005-01-01	-5550186442.62803000
2005-04-01	-3273764544.60394000
2005-07-01	-1970591495.86478000
2005-10-01	9491325813.71251100
2006-01-01	-1816134868.71600000
2006-04-01	4248020076.36374040
2006-07-01	-8824184385.59264000
2006-10-01	9208882657.46602000
2007-01-01	-11975596108.79700000
2007-04-01	12383990158.98449900
2007-07-01	-4574485833.14902000
2007-10-01	2738454588.36676030
2008-01-01	-14940873755.82970000
2008-04-01	1882592412.55343000
2008-07-01	-8970815869.51303000
2008-10-01	6387056249.41112000
2009-01-01	2087289243.19753000
2009-04-01	-15779714046.67240000
2009-07-01	990711480.32837590
2009-10-01	-6535352987.71358000
2010-01-01	-3684006602.55206000
2010-04-01	1457858590.74819000
2010-07-01	-2936334442.92147970
2010-10-01	-4787540549.72371000
2011-01-01	719980943.76395890
2011-04-01	-8342742141.49974100
2011-07-01	11267615349.38560000
2011-10-01	-5474865923.40063000
2012-01-01	-21666474906.72990000
2012-04-01	17738277310.40379700
2012-07-01	-4480326016.52027000
2012-10-01	-4436671325.56358000
2013-01-01	-1292972852.96745010
2013-04-01	7854343287.30324900
2013-07-01	-4429483616.39837000
2013-10-01	-2910741636.48505000
2014-01-01	11824060349.30520000
2014-04-01	-15068065732.12050000
2014-07-01	-505570390.99732800
2014-10-01	6370451288.86549950
2015-01-01	3869132505.63556000
2015-04-01	12344598796.62480000
2015-07-01	2114448503.68301000
2015-10-01	3647213602.63573000
2016-01-01	-11501870128.91390000
2016-04-01	-9343144901.95284000
2016-07-01	-10597437701.54690000
2016-10-01	4847713898.63726000
2017-01-01	3084787801.92687000
2017-04-01	432212341.38641700
2017-07-01	-8276635252.21780000
2017-10-01	5410693189.89006000
2018-01-01	486635536.56831497
2018-04-01	-906508823.76803600