Quarter	US Dollars, sum over component sub-periods
1995-01-01	-4122282123.34686040
1997-01-01	-7026602294.47444000
1997-04-01	13902190378.67400000
1997-07-01	9015224186.48782000
1997-10-01	4278487837.62029000
1998-01-01	-6648457149.27401000
1998-04-01	2358123118.07019000
1998-07-01	332709398.63902500
1998-10-01	2868578291.89525000
1999-01-01	-4148776585.83943940
1999-04-01	1641133073.10115000
1999-07-01	1793222007.69184000
1999-10-01	-6374686659.17807000
2000-01-01	-2868990283.70571040
2000-04-01	-3996079470.71576000
2000-07-01	1710672764.92507000
2000-10-01	3424911639.26880030
2001-01-01	4199900878.96468970
2001-04-01	-4341078622.88198950
2001-07-01	3115567643.99141030
2001-10-01	6267872655.01308000
2002-01-01	90292821.64911279
2002-04-01	-1663582721.70673000
2002-07-01	4738426444.83513000
2002-10-01	-3460615311.04907000
2003-01-01	-9939754870.81124100
2003-04-01	-13924894423.93690000
2003-07-01	5116111165.67880000
2003-10-01	-3801737737.76778000
2004-01-01	-6066977135.81166100
2004-04-01	-6033462552.65839000
2004-07-01	5778372763.52840000
2004-10-01	-3853821847.07521000
2005-01-01	-13842377020.15910000
2005-04-01	-13462291674.78889800
2005-07-01	-3231677371.15024000
2005-10-01	-9118818452.38638900
2006-01-01	-17119639324.12650000
2006-04-01	-8319322115.34752100
2006-07-01	-4799936215.75265000
2006-10-01	-11760054794.39120100
2007-01-01	-7751313698.99035900
2007-04-01	-8580520918.08938000
2007-07-01	-7075109430.56769900
2007-10-01	-5970172983.42209000
2008-01-01	-21896301824.16160200
2008-04-01	-27920226337.52079800
2008-07-01	27135124776.38240000
2008-10-01	-18928308006.52120200
2009-01-01	-56338464631.88890000
2009-04-01	-20217622440.01130000
2009-07-01	44971091871.27320000
2009-10-01	-15453480583.05410000
2010-01-01	-8857501507.31914900
2010-04-01	-31908208029.52830000
2010-07-01	-25442373213.23670200
2010-10-01	-40015163003.63020000
2011-01-01	-16928986034.34360100
2011-04-01	-33227614567.43200000
2011-07-01	-10756343119.96340000
2011-10-01	-19311247269.62010200
2012-01-01	5942002711.76305000
2012-04-01	-10272930579.47490000
2012-07-01	-1890786674.94194000
2012-10-01	2301005750.95777000
2013-01-01	-6254404860.76713000
2013-04-01	19023339594.75540000
2013-07-01	17951065182.24600000
2013-10-01	-2060726134.03711000
2014-01-01	21234409459.42500000
2014-04-01	3186802999.63126000
2014-07-01	6492811256.66465950
2014-10-01	35953424099.17740000
2015-01-01	-8360793459.22470000
2015-04-01	7397247267.43365000
2015-07-01	14259742879.46470000
2015-10-01	25301792055.24850000
2016-01-01	-4398616681.15135000
2016-04-01	31240929037.63930000
2016-07-01	21479422798.47060000
2016-10-01	24281669861.25600000
2017-01-01	1031459271.93962000
2017-04-01	20434955509.67180000
2017-07-01	29117970934.15410000
2017-10-01	20916244424.81330000
2018-01-01	6660516687.37442000
2018-04-01	6288383811.65763000