Quarter	US Dollars, sum over component sub-periods
1991-01-01	17037327510.2894000
1991-04-01	-5876289204.4143600
1991-07-01	-3241335391.3791504
1991-10-01	16808220856.8091980
1992-01-01	-7483371696.7538805
1992-04-01	-8202297652.2331590
1992-07-01	-5646465851.8265600
1992-10-01	28127703787.9929000
1993-01-01	34696980889.3692000
1993-04-01	26157911766.8871000
1993-07-01	3449818767.2621100
1993-10-01	67516641730.5521000
1994-01-01	-18875426980.6287000
1994-04-01	-17042355565.3622000
1994-07-01	1950654963.2980500
1994-10-01	35214062814.2006000
1995-01-01	12200752413.6688000
1995-04-01	34178696583.5840030
1995-07-01	12347292073.1707000
1995-10-01	3560466833.6649904
1996-01-01	-3916987422.5400100
1996-04-01	8972734778.8947980
1996-07-01	-5105457962.4354600
1996-10-01	40435395530.8723000
1997-01-01	26502489257.2118000
1997-04-01	16159487373.7669010
1997-07-01	1007011243.2253100
1997-10-01	39901692438.4414000
1998-01-01	25367721592.2586000
1998-04-01	25866024398.0673000
1998-07-01	11361030539.9580000
1998-10-01	23346627144.2898000
1999-01-01	43620524384.6646960
1999-04-01	-8405391154.8271500
1999-07-01	32351402887.3060000
1999-10-01	5770637874.4757500
2000-01-01	30849050032.6746000
2000-04-01	16198176774.8457010
2000-07-01	24828702702.7555000
2000-10-01	8777477278.0955980
2001-01-01	75773519241.1806000
2001-04-01	-8337876855.7850100
2001-07-01	41549816276.5206000
2001-10-01	-3039891367.6928200
2002-01-01	21992876791.5820000
2002-04-01	53269592447.5311000
2002-07-01	65837272893.1639000
2002-10-01	19719204330.9561000
2003-01-01	98709420090.3145900
2003-04-01	61252951448.7966000
2003-07-01	-1313641744.8508600
2003-10-01	19403736240.9324000
2004-01-01	76401656846.8976000
2004-04-01	-30849482121.0236000
2004-07-01	95025254508.8158000
2004-10-01	45254879404.2260000
2005-01-01	95046271219.8351900
2005-04-01	42969339501.9461060
2005-07-01	40732549386.3356000
2005-10-01	-16212157861.5467010
2006-01-01	105056268972.1689900
2006-04-01	72707029219.8985000
2006-07-01	35585294515.0860060
2006-10-01	41399468972.9062040
2007-01-01	95745506458.4692100
2007-04-01	163562388529.7380000
2007-07-01	127324472239.8000000
2007-10-01	76295043143.2419000
2008-01-01	201162815574.9810200
2008-04-01	-6146698592.2649800
2008-07-01	110840746751.8030100
2008-10-01	-85596351492.4372000
2009-01-01	-78607393564.4882000
2009-04-01	40387581079.3084950
2009-07-01	-110746266575.2000000
2009-10-01	3524840721.6197000
2010-01-01	24548051357.5756000
2010-04-01	100268598916.8910000
2010-07-01	69919678872.1362900
2010-10-01	-37756581841.5923000
2011-01-01	-6028097191.5216400
2011-04-01	68247154116.9507000
2011-07-01	225629051966.9080200
2011-10-01	-93194653850.5282000
2012-01-01	245880360723.1490200
2012-04-01	111757071526.8060000
2012-07-01	-29611896674.9345000
2012-10-01	-110383385866.8710000
2013-01-01	-54326235638.7140050
2013-04-01	-12956923803.3480990
2013-07-01	-71054533537.9311000
2013-10-01	-88449251233.9060000
2014-01-01	31840650249.8271000
2014-04-01	49939835819.0925000
2014-07-01	26653374320.2495000
2014-10-01	-47785564363.2535000
2015-01-01	154137143129.6569800
2015-04-01	-69192134353.4860100
2015-07-01	43733065029.6455000
2015-10-01	-117617988022.5930000
2016-01-01	80585831744.5313000
2016-04-01	126129068524.1150000
2016-07-01	-16738082.0809943
2016-10-01	-3444796917.9691800
2017-01-01	162003039120.4670000
2017-04-01	-986499924.2331201
2017-07-01	4209374307.3575397
2017-10-01	-19218264102.7629000
2018-01-01	85465980548.6192000
2018-04-01	55734211361.9696040