Quarter	US Dollars, sum over component sub-periods
1993-01-01	-2868986509.73757000
1993-04-01	-2564444550.90295030
1993-07-01	396812807.19737400
1993-10-01	266603066.64393700
1994-01-01	-2018544116.30544000
1994-04-01	-400105043.44919100
1994-07-01	-555875294.51797000
1994-10-01	-1479577046.35790000
1995-01-01	-2155167167.40844000
1995-04-01	-949160569.55769500
1995-07-01	2247872665.39018000
1995-10-01	1468425174.97465000
1996-01-01	-1305951680.46000000
1996-04-01	-295947136.95508105
1996-07-01	3194561559.40556000
1996-10-01	2002596665.08965020
1997-01-01	-686184297.02297800
1997-04-01	1205582113.38050000
1997-07-01	1836975975.60037000
1997-10-01	344485788.52727900
1998-01-01	-581750110.05948000
1998-04-01	-437078342.50885403
1998-07-01	2355476310.41316000
1998-10-01	-2472187143.30907000
1999-01-01	-2903919109.19009970
1999-04-01	-2626024267.00345000
1999-07-01	-3071548105.57275000
1999-10-01	-3446814457.03848030
2000-01-01	-6302695791.87105000
2000-04-01	-4225814350.31288050
2000-07-01	-4372924199.40432900
2000-10-01	-3235363343.41691000
2001-01-01	-6434558156.83210100
2001-04-01	-3271537512.89657000
2001-07-01	-4692517332.75273000
2001-10-01	-5125898142.98940000
2002-01-01	-6306471446.05551000
2002-04-01	-1765659936.80316000
2002-07-01	-3132063483.56966000
2002-10-01	-2991396293.73712970
2003-01-01	-7463135960.88992000
2003-04-01	-3958582026.87169000
2003-07-01	-5992997985.93485900
2003-10-01	-2298891176.64080000
2004-01-01	-11597639993.59670000
2004-04-01	-8572916327.81844000
2004-07-01	-11275529755.66210200
2004-10-01	-11552397725.11490000
2005-01-01	-21643538659.94009800
2005-04-01	-16215913642.11040000
2005-07-01	-20294933890.82350000
2005-10-01	-17220734625.29050000
2006-01-01	-29151021597.86960000
2006-04-01	-22230525797.57539700
2006-07-01	-29784840527.32970000
2006-10-01	-25518170889.26640000
2007-01-01	-31424811694.41829700
2007-04-01	-32642377613.60820000
2007-07-01	-39709154794.72529600
2007-10-01	-33647431231.81090000
2008-01-01	-44782918770.16860000
2008-04-01	-45268443507.96419500
2008-07-01	-34749634259.94070000
2008-10-01	-22848721509.12080000
2009-01-01	-24960820376.95229700
2009-04-01	-12900548118.96990000
2009-07-01	-13995265843.96890000
2009-10-01	-18786352601.77870000
2010-01-01	-22854318840.00670200
2010-04-01	-13217680694.64190100
2010-07-01	-15077775602.11480000
2010-10-01	-5901629142.15204000
2011-01-01	-12672813079.65840000
2011-04-01	-10145605782.11159900
2011-07-01	-11609169484.42360100
2011-10-01	-6989935870.70319900
2012-01-01	-12188252748.42770000
2012-04-01	-1455470753.67670000
2012-07-01	2054713249.67218020
2012-10-01	13673658540.37850000
2013-01-01	-15010571665.84110000
2013-04-01	24443280506.34649700
2013-07-01	9998128689.16714100
2013-10-01	25054019781.51989700
2014-01-01	3252178497.94860030
2014-04-01	-7131911532.30732100
2014-07-01	3621245609.08225000
2014-10-01	15228448993.31690000
2015-01-01	-5048897086.92914000
2015-04-01	5811174812.06585000
2015-07-01	5908671817.59999100
2015-10-01	17323443907.38860000
2016-01-01	-5193255274.76451000
2016-04-01	6900647630.63014000
2016-07-01	8882342224.31431000
2016-10-01	16662602295.73829800
2017-01-01	-5783843933.97549000
2017-04-01	2387615758.65117000
2017-07-01	8923779572.35006000
2017-10-01	20247414450.52440000
2018-01-01	677111567.29581200
2018-04-01	7115081740.29760000