Quarter	US Dollars, sum over component sub-periods
2006-01-01	1320260464912.19020
2006-04-01	448735434154.87800
2006-07-01	558496885409.91100
2006-10-01	734108263876.83300
2007-01-01	1992826152662.19000
2007-04-01	1230903098343.01000
2007-07-01	686576619106.85500
2007-10-01	826881420296.28200
2008-01-01	1331246475062.01000
2008-04-01	-873507742383.55100
2008-07-01	114549552177.19699
2008-10-01	-2015464997455.90010
2009-01-01	-844441705620.03490
2009-04-01	-540939667376.03300
2009-07-01	-312167155609.25900
2009-10-01	-339765184582.24097
2010-01-01	631911563770.35000
2010-04-01	597948194660.93600
2010-07-01	520019386266.27000
2010-10-01	-2130157464.54498
2011-01-01	685861409978.79800
2011-04-01	131842760633.73100
2011-07-01	1151216304331.27000
2011-10-01	-518318272670.36400
2012-01-01	345487597185.61400
2012-04-01	-73113591146.90370
2012-07-01	-217130612497.58398
2012-10-01	-348282409922.04504
2013-01-01	47471809046.17910
2013-04-01	159726139090.18600
2013-07-01	-237796916922.38400
2013-10-01	-321602295092.86100
2014-01-01	521317340975.54205
2014-04-01	227624659937.52902
2014-07-01	257822419941.49500
2014-10-01	-230801476765.17200
2015-01-01	695796970140.11000
2015-04-01	-567300626064.69500
2015-07-01	93670903070.12250
2015-10-01	-469378049957.25800
2016-01-01	337019500278.63904
2016-04-01	900059234438.92200
2016-07-01	35644281930.42530
2016-10-01	-174570050887.27402
2017-01-01	807002551239.85400
2017-04-01	29203219836.67720
2017-07-01	241171528142.20100
2017-10-01	115059356463.72499
2018-01-01	734927931880.98790
2018-04-01	92565416479.65870