Quarter	US Dollars, sum over component sub-periods
1999-01-01	40501122682.470300
1999-04-01	-36465511195.562805
1999-07-01	-22156704523.700500
1999-10-01	-89919084930.903700
2000-01-01	-17788493169.179300
2000-04-01	-120841855482.928010
2000-07-01	-91774192229.738600
2000-10-01	-137418719982.111010
2001-01-01	-108213684513.652000
2001-04-01	-93438492888.893390
2001-07-01	-23445103130.885200
2001-10-01	-72989653144.931700
2002-01-01	-67850562788.256500
2002-04-01	-86094336165.206510
2002-07-01	-102662373784.892000
2002-10-01	-142582279549.775000
2003-01-01	-120630424395.799000
2003-04-01	-72348131473.996400
2003-07-01	-99864723313.309900
2003-10-01	-174304287978.725000
2004-01-01	-57005569345.305700
2004-04-01	-96977774760.042400
2004-07-01	-19770562257.860100
2004-10-01	-113882692719.453000
2005-01-01	-36695611741.972600
2005-04-01	-48968018627.900900
2005-07-01	-223757515005.341000
2005-10-01	-238293183824.153000
2006-01-01	-103809945514.179000
2006-04-01	-110675055582.430000
2006-07-01	-213018624289.035000
2006-10-01	-190875637871.919980
2007-01-01	-167779224281.780030
2007-04-01	-32684715331.808598
2007-07-01	-59706097017.056900
2007-10-01	-39175963246.088005
2008-01-01	-66896097988.469000
2008-04-01	-111794768377.326000
2008-07-01	-183414197081.772000
2008-10-01	-248143076893.748000
2009-01-01	-18873413309.065700
2009-04-01	9749641026.294040
2009-07-01	33039893138.075500
2009-10-01	-153851674309.030000
2010-01-01	-29318857261.594500
2010-04-01	873218746.548859
2010-07-01	-175444126757.505980
2010-10-01	-148014208388.999000
2011-01-01	-102882371443.538000
2011-04-01	-134615965276.717990
2011-07-01	-126996996266.741000
2011-10-01	-86773576555.825410
2012-01-01	-240351352836.329000
2012-04-01	-47526639415.187600
2012-07-01	30990561378.781800
2012-10-01	-151635872036.469000
2013-01-01	-40468882010.808700
2013-04-01	17645672401.950400
2013-07-01	-95189171647.369110
2013-10-01	-165921753098.751000
2014-01-01	-102145192796.631000
2014-04-01	-29730469542.967598
2014-07-01	23806715703.005400
2014-10-01	45104290577.837000
2015-01-01	-82053834483.850890
2015-04-01	-25656541580.596200
2015-07-01	46617990249.718000
2015-10-01	17396074151.302002
2016-01-01	-48205126103.248100
2016-04-01	104915916392.702000
2016-07-01	-65676044155.206200
2016-10-01	28539577654.248600
2017-01-01	-6929714120.291630
2017-04-01	-14006369702.598300
2017-07-01	12465688800.578500
2017-10-01	53388789312.107900
2018-01-01	-43970090693.177200