Quarter	US Dollars, sum over component sub-periods
2006-01-01	8215082994.000000
2006-04-01	10638076730.000000
2006-07-01	14815292300.000000
2006-10-01	15846156030.000000
2007-01-01	11128426670.000000
2007-04-01	15451914200.000000
2007-07-01	19529160670.000000
2007-10-01	16947102330.000002
2008-01-01	19283457600.000000
2008-04-01	19843546670.000000
2008-07-01	19893936750.000000
2008-10-01	16210054930.000000
2009-01-01	18222065070.000000
2009-04-01	21836760800.000000
2009-07-01	19173311200.000000
2009-10-01	15759238400.000000
2010-01-01	15824398670.000000
2010-04-01	21820212530.000000
2010-07-01	19116213870.000000
2010-10-01	20011244800.000000
2011-01-01	15219657470.000000
2011-04-01	20156448070.000000
2011-07-01	23439005330.000000
2011-10-01	19201502930.000000
2012-01-01	19002247470.000000
2012-04-01	19789534400.000000
2012-07-01	17258616530.000000
2012-10-01	17356598810.000000
2013-01-01	17767180850.000000
2013-04-01	18746132860.000000
2013-07-01	19187688800.000000
2013-10-01	20950730400.000000
2014-01-01	26786086670.000000
2014-04-01	18660638670.000000
2014-07-01	27732906340.000000
2014-10-01	27365305330.000000
2015-01-01	18013915470.000000
2015-04-01	23190711600.000000
2015-07-01	25940849870.000000
2015-10-01	20890640800.000000
2016-01-01	18045232240.000000
2016-04-01	17933469750.000000
2016-07-01	14613869470.000000
2016-10-01	19674246070.000000
2017-01-01	15799154060.000000
2017-04-01	22793157420.000000
2017-07-01	16712525549.999998
2017-10-01	21513032300.000000
2018-01-01	21423982330.000000
2018-04-01	20713657110.000000