Quarter	US Dollars, sum over component sub-periods
1987-01-01	1506266003.4518600
1987-04-01	-11173424507.9165000
1987-07-01	16765226613.7228000
1987-10-01	8959344645.5470700
1988-01-01	-10216580979.7371000
1988-04-01	-14828343300.4765990
1988-07-01	694907083.6490810
1988-10-01	6257738318.6832400
1989-01-01	-22774187875.4485000
1989-04-01	-12294995704.3816990
1989-07-01	-19510395237.3317000
1989-10-01	-1282252344.0494100
1990-01-01	-13269818547.6455000
1990-04-01	-3779863382.2894096
1990-07-01	15335961781.5677990
1990-10-01	-32439797416.8647000
1991-01-01	-5176028145.6403700
1991-04-01	-24319087682.2146000
1991-07-01	-17639460108.0695000
1991-10-01	-9692721675.5890000
1992-01-01	-20839409830.4875000
1992-04-01	-8920544915.3273810
1992-07-01	-3690058518.5831200
1992-10-01	-26959881904.7328000
1993-01-01	-39639400404.2274000
1993-04-01	-10744942862.6159000
1993-07-01	-23620425503.7147980
1993-10-01	-63094700683.5234000
1994-01-01	44750448765.0976000
1994-04-01	27979247082.6007000
1994-07-01	6494413793.4683800
1994-10-01	-18144812385.5249000
1995-01-01	-27153196588.7651000
1995-04-01	19508906744.2883000
1995-07-01	-16467069733.0782000
1995-10-01	-2353192111.2314500
1996-01-01	22387242248.9311000
1996-04-01	-39642039287.9549000
1996-07-01	-15373904681.5803990
1996-10-01	-1851363729.9716098
1997-01-01	9980067201.6105400
1997-04-01	-55845563283.5192000
1997-07-01	-3994370025.3780400
1997-10-01	2119804945.1808503
1998-01-01	-23245315332.1641000
1998-04-01	-33600136225.5668000
1998-07-01	6537461362.8317100
1998-10-01	-22871936955.1106000
1999-01-01	-6837576426.0531400
1999-04-01	32906084470.2655030
1999-07-01	-39599192313.5227000
1999-10-01	27078918142.7056000
2000-01-01	-12495027995.2349990
2000-04-01	-60783598487.0741040
2000-07-01	42490251643.3720000
2000-10-01	21634482874.9765000
2001-01-01	-81945608322.8672000
2001-04-01	-63581834551.9612000
2001-07-01	-43768079327.2765000
2001-10-01	-19473065311.4479000
2002-01-01	-20250517193.5809020
2002-04-01	-57729535468.8163000
2002-07-01	42268577429.6461000
2002-10-01	42703304713.9762000
2003-01-01	-36632030204.4283000
2003-04-01	-53098256136.5596000
2003-07-01	77784685216.9358000
2003-10-01	41306795038.3002000
2004-01-01	13811902928.9876000
2004-04-01	5711452209.3570200
2004-07-01	-100019241887.8930000
2004-10-01	-30663879914.1768000
2005-01-01	44967702155.0663000
2005-04-01	-42756233882.0391000
2005-07-01	17425535030.6836000
2005-10-01	81972024440.3977000
2006-01-01	-18726276384.5199000
2006-04-01	-92604293766.3087000
2006-07-01	99928018690.7182900
2006-10-01	-92377340032.9962000
2007-01-01	-90763978841.6143000
2007-04-01	-62134232236.9439000
2007-07-01	-13172624049.8782000
2007-10-01	-11689031225.2370000
2008-01-01	68616856812.9629000
2008-04-01	89439176076.4321900
2008-07-01	42728699650.6817000
2008-10-01	128211268195.9310000
2009-01-01	22283546185.2888000
2009-04-01	58027756919.5503000
2009-07-01	69771247184.5508000
2009-10-01	68976860462.8645000
2010-01-01	167464498100.5319800
2010-04-01	17455705260.5753020
2010-07-01	-17786453809.1325000
2010-10-01	-3493077266.6368900
2011-01-01	-2993920304.8022800
2011-04-01	-63580480171.3133000
2011-07-01	135503879082.9760000
2011-10-01	33299567313.5796970
2012-01-01	-62892813300.8851000
2012-04-01	42854783889.9804000
2012-07-01	-224270784036.8970000
2012-10-01	-34965256098.8253900
2013-01-01	-9245482327.9653700
2013-04-01	8631222480.8536590
2013-07-01	105818961214.0080000
2013-10-01	-14922574848.1759000
2014-01-01	-15283579496.6370000
2014-04-01	-28297418151.0941000
2014-07-01	13368580629.1124000
2014-10-01	-7486407567.1566200
2015-01-01	195959584460.3580000
2015-04-01	113401022436.3840000
2015-07-01	-18026985918.8611000
2015-10-01	-31115819746.9564970
2016-01-01	-20780054943.4368020
2016-04-01	130544042004.8929900
2016-07-01	46968195154.9938050
2016-10-01	72169957786.1117000
2017-01-01	-69136119947.4552000
2017-04-01	-61926452503.6362000
2017-07-01	-26008323082.1577030
2017-10-01	52875010609.6769000
2018-01-01	52998325743.8711000
2018-04-01	162677449566.7580000