Quarter	US Dollars, sum over component sub-periods
1999-01-01	76330305.150725590
1999-04-01	382543575.313984000
1999-07-01	171981525.883896020
1999-10-01	563571288.820204000
2000-01-01	444268970.291662040
2000-04-01	266156262.947883000
2000-07-01	128323049.455552000
2000-10-01	550385648.047005000
2001-01-01	33215384.807277800
2001-04-01	225442488.869475000
2001-07-01	-20503020.260887697
2001-10-01	-779229667.027919000
2002-01-01	159546539.224646000
2002-04-01	215189804.797885000
2002-07-01	-170178072.442698000
2002-10-01	-113052769.629530000
2003-01-01	-8006338894.752160000
2003-04-01	-607701975.430805000
2003-07-01	-46151937.908213600
2003-10-01	290336152.743455000
2004-01-01	5000599.328919561
2004-04-01	-62672803.183826600
2004-07-01	1046611740.495199900
2004-10-01	569977012.676669000
2005-01-01	-35382389.429546100
2005-04-01	445512877.711066000
2005-07-01	156096114.531030980
2005-10-01	-510235178.827933000
2006-01-01	-104652095.362493000
2006-04-01	-84211298.040230300
2006-07-01	418050737.856311000
2006-10-01	328925520.738155000
2007-01-01	473312626.071637000
2007-04-01	1490975040.912310100
2007-07-01	49495518.752514005
2007-10-01	221707880.209607000
2008-01-01	361067994.500372000
2008-04-01	207753726.244279980
2008-07-01	-49483815.076294200
2008-10-01	24954055.795441500
2009-01-01	-62450840.661647700
2009-04-01	329561136.365534000
2009-07-01	195968051.985254970
2009-10-01	0.000000000
2010-01-01	222786711.869768000
2010-04-01	212204641.031070980
2010-07-01	-513060505.188957000
2010-10-01	290466567.714015000
2011-01-01	72462951.043467200
2011-04-01	56132589.800305300
2011-07-01	-722925659.939780000
2011-10-01	354347173.090775000
2012-01-01	-841925787.012112000
2012-04-01	-766847145.990014100
2012-07-01	-2033440335.394210000
2012-10-01	-689133702.063494000
2013-01-01	-335151652.876551000
2013-04-01	470163548.957295000
2013-07-01	-231806110.307929000
2013-10-01	175583666.638565000
2014-01-01	-947010257.936149000
2014-04-01	-817269616.084438000
2014-07-01	214572709.828575020
2014-10-01	-62432145.758104800
2015-01-01	759867454.554554000
2015-04-01	-1254258134.161150200
2015-07-01	167866311.280828000
2015-10-01	-782405558.321196100
2016-01-01	234754535.977258000
2016-04-01	691081058.737628900
2016-07-01	363774317.226943000
2016-10-01	301702576.487760000
2017-01-01	294093759.354685960
2017-04-01	46190631.903891900
2017-07-01	89261285.535483600
2017-10-01	870185477.111807000
2018-01-01	1065436894.456390000
2018-04-01	334729276.581890050