Quarter	US Dollars, sum over component sub-periods
2004-01-01	5728900006.670120
2004-04-01	6915317230.374519
2004-07-01	6720780880.928500
2004-10-01	7944534437.738620
2005-01-01	7420040824.634689
2005-04-01	8220841932.495590
2005-07-01	7828931982.607100
2005-10-01	9445956310.291060
2006-01-01	8921822969.120360
2006-04-01	10372443689.926900
2006-07-01	11019304198.490200
2006-10-01	13066581633.098700
2007-01-01	12282111961.652500
2007-04-01	13926470301.983200
2007-07-01	14180162289.110400
2007-10-01	17493919305.426800
2008-01-01	17092705665.252298
2008-04-01	19642211936.240700
2008-07-01	18156174511.406000
2008-10-01	15401105063.503101
2009-01-01	11790068187.328900
2009-04-01	12270432673.530500
2009-07-01	13352290374.133999
2009-10-01	15787801462.557600
2010-01-01	13661115119.646500
2010-04-01	14209451487.005700
2010-07-01	15592774623.066400
2010-10-01	18270347109.211500
2011-01-01	17588535611.388298
2011-04-01	20135191750.521800
2011-07-01	18926109059.372700
2011-10-01	19470231932.831898
2012-01-01	17885415048.298000
2012-04-01	18546159755.175900
2012-07-01	18143042913.731400
2012-10-01	19536486222.246400
2013-01-01	18132232218.499900
2013-04-01	19352715280.997200
2013-07-01	19393429030.899200
2013-10-01	22188739342.443600
2014-01-01	20226138190.592000
2014-04-01	20526494312.297897
2014-07-01	18956174390.454400
2014-10-01	19708704637.210100
2015-01-01	16917576435.246399
2015-04-01	17433413831.423800
2015-07-01	17467656971.067100
2015-10-01	18710654433.659603
2016-01-01	17010996999.974600
2016-04-01	18828909963.576500
2016-07-01	17423562335.817997
2016-10-01	19183435073.213700
2017-01-01	18564881670.684402
2017-04-01	19036589117.628998
2017-07-01	20151674802.114803
2017-10-01	22254022125.147198
2018-01-01	22296263942.628498
2018-04-01	22563254777.138298