Quarter	US Dollars, sum over component sub-periods
1999-01-01	82968451834.823610
1999-04-01	5005780757.961850
1999-07-01	37932857603.364800
1999-10-01	-34049583267.824097
2000-01-01	41907222396.962900
2000-04-01	-48401085903.977700
2000-07-01	-7300800559.371550
2000-10-01	-43328157156.554300
2001-01-01	-44148704988.126900
2001-04-01	-2495516257.639820
2001-07-01	56329091996.859700
2001-10-01	-12227341241.585000
2002-01-01	-19158882641.398400
2002-04-01	10886463599.304900
2002-07-01	-19933784792.122902
2002-10-01	-47391229901.693600
2003-01-01	-25996737011.735800
2003-04-01	46919630633.589096
2003-07-01	-5690288749.006500
2003-10-01	-113043089985.536990
2004-01-01	-7733110454.200439
2004-04-01	-4768742173.299740
2004-07-01	81713480102.057500
2004-10-01	-6892733389.071760
2005-01-01	54983279085.143900
2005-04-01	70942269647.462700
2005-07-01	-101541579154.031000
2005-10-01	-88492266141.875200
2006-01-01	19630064276.117600
2006-04-01	53790461683.196910
2006-07-01	-47241496518.120300
2006-10-01	-83734886363.175400
2007-01-01	-71166819398.699890
2007-04-01	85357354041.355300
2007-07-01	42176569680.423004
2007-10-01	49819283354.491300
2008-01-01	19070212204.269100
2008-04-01	33339003608.959000
2008-07-01	-27583680460.632600
2008-10-01	-93500512170.048800
2009-01-01	56449437181.875404
2009-04-01	86799436760.228790
2009-07-01	76780863373.338000
2009-10-01	-129682545884.212000
2010-01-01	14014554167.249900
2010-04-01	89375454203.714100
2010-07-01	-89970267228.542800
2010-10-01	-108766421160.970000
2011-01-01	-43603070489.209400
2011-04-01	-36074500356.998700
2011-07-01	-57317562025.284300
2011-10-01	-35622535843.689804
2012-01-01	-168655208665.892000
2012-04-01	58899844403.834300
2012-07-01	116635681916.671000
2012-10-01	-100507657777.855000
2013-01-01	36554352335.471800
2013-04-01	75195665763.433990
2013-07-01	-7669127252.984720
2013-10-01	-125045048489.994000
2014-01-01	-36196486709.154100
2014-04-01	43736779540.127304
2014-07-01	80115231141.308400
2014-10-01	73724307899.594100
2015-01-01	-35542533418.244290
2015-04-01	12572587512.718300
2015-07-01	89552321984.067600
2015-10-01	41821552295.800600
2016-01-01	-8644251226.083730
2016-04-01	132258464063.657010
2016-07-01	-19056211906.612800
2016-10-01	24306753663.710800
2017-01-01	372385666.441354
2017-04-01	51807021734.396805
2017-07-01	-12098939172.357800
2017-10-01	50914099678.273400
2018-01-01	-33634931169.679703