Quarter	US Dollars, sum over component sub-periods
2002-01-01	9738475298.058199
2002-04-01	10820184800.221899
2002-07-01	11420620930.981100
2002-10-01	11368306383.189000
2003-01-01	11965493875.155200
2003-04-01	13581855177.992800
2003-07-01	14251943557.460800
2003-10-01	15709089707.045399
2004-01-01	15528111066.127500
2004-04-01	16247924225.407099
2004-07-01	16715220916.249800
2004-10-01	17647265553.850600
2005-01-01	17505109555.551000
2005-04-01	17956434291.473100
2005-07-01	18829093815.305603
2005-10-01	19162958511.132100
2006-01-01	17908740181.112600
2006-04-01	21027686809.150000
2006-07-01	20279284420.828600
2006-10-01	22672642658.880600
2007-01-01	21448535318.298897
2007-04-01	24064552852.916500
2007-07-01	25069480248.148300
2007-10-01	28200372919.994500
2008-01-01	27935576039.228000
2008-04-01	30068056214.106400
2008-07-01	28471187783.442400
2008-10-01	28053612199.506798
2009-01-01	24420880817.065200
2009-04-01	26456133042.038200
2009-07-01	25477277181.820200
2009-10-01	31220017820.060200
2010-01-01	25872317713.223900
2010-04-01	26257465283.030300
2010-07-01	26493048756.608600
2010-10-01	31352744147.785202
2011-01-01	28577747220.953800
2011-04-01	30539007445.714800
2011-07-01	29274253335.022400
2011-10-01	30950810875.442200
2012-01-01	28388111388.553200
2012-04-01	31376615331.243600
2012-07-01	27731120783.182198
2012-10-01	31487310507.466100
2013-01-01	28635673900.499603
2013-04-01	31211023591.615100
2013-07-01	29693700427.273400
2013-10-01	34125842557.845703
2014-01-01	34155411936.736200
2014-04-01	38219695871.653400
2014-07-01	36669416491.383300
2014-10-01	38675465654.230800
2015-01-01	38158854973.386200
2015-04-01	43504175653.404305
2015-07-01	43687485435.191795
2015-10-01	44229440925.572600
2016-01-01	38615467967.301410
2016-04-01	55431024528.288795
2016-07-01	52967102809.237100
2016-10-01	55458321104.459000
2017-01-01	44317585309.133100
2017-04-01	54021043788.551704
2017-07-01	46487512404.999700
2017-10-01	56240593718.286995
2018-01-01	48485366402.280000
2018-04-01	52517951409.047500