Quarter	US Dollars, sum over component sub-periods
2002-01-01	41679780113.76600000
2002-04-01	39350030728.03440000
2002-07-01	30855448648.07719800
2002-10-01	45701432052.68940000
2003-01-01	52691006641.71280000
2003-04-01	75772257917.11281000
2003-07-01	54079940315.22700500
2003-10-01	83753293779.94970000
2004-01-01	103500279655.26200000
2004-04-01	54305140286.43519600
2004-07-01	56831873382.97620000
2004-10-01	77369197861.65170000
2005-01-01	95073397718.39790000
2005-04-01	97876662211.21330000
2005-07-01	85905423480.63159000
2005-10-01	107039966489.87500000
2006-01-01	87935667329.92420000
2006-04-01	97658208386.69600000
2006-07-01	115390288190.40300000
2006-10-01	156337397074.04300000
2007-01-01	144995848541.48102000
2007-04-01	161887400746.43503000
2007-07-01	99204693160.97640000
2007-10-01	112511387643.25900000
2008-01-01	208216376231.03000000
2008-04-01	84233982614.45730000
2008-07-01	-80207266200.48180000
2008-10-01	-3379304503.24584000
2009-01-01	-23546569047.80209700
2009-04-01	6811838033.47274000
2009-07-01	12458990750.30340000
2009-10-01	-14351875564.90230000
2010-01-01	40626056358.90999600
2010-04-01	27850906120.47319800
2010-07-01	62900959467.39770000
2010-10-01	-86309290223.35880000
2011-01-01	777951304.59873200
2011-04-01	-1751624661.20439980
2011-07-01	14632184792.88270000
2011-10-01	-10169629134.93980000
2012-01-01	500958957.38103795
2012-04-01	-142341192.65032002
2012-07-01	27689826302.52500000
2012-10-01	6274880319.16572000
2013-01-01	133094791032.88200000
2013-04-01	-18487875552.88739800
2013-07-01	11163782272.42990100
2013-10-01	10333575171.47280000
2014-01-01	111526561157.84400000
2014-04-01	101814516316.53300000
2014-07-01	112777826858.41899000
2014-10-01	104165537911.56800000
2015-01-01	178422506977.22100000
2015-04-01	41772104896.70560000
2015-07-01	11303739424.52620100
2015-10-01	284146719038.58700000
2016-01-01	84831251803.61300000
2016-04-01	21991509181.23420000
2016-07-01	35211345337.71830000
2016-10-01	78972804414.07469000
2017-01-01	109271814956.75200000
2017-04-01	149708237108.31400000
2017-07-01	123447183404.97500000
2017-10-01	5560237920.05677000
2018-01-01	212613032130.88500000
2018-04-01	63997617026.19939400