Quarter	US Dollars, sum over component sub-periods
2005-01-01	12267764171.22040000
2005-04-01	441243650.28150200
2005-07-01	1508215607.06103000
2005-10-01	4991769526.98827900
2006-01-01	3761380620.69423000
2006-04-01	4157364483.08918000
2006-07-01	11831861445.48690000
2006-10-01	4254399940.86358000
2007-01-01	12379950269.89790000
2007-04-01	11542761738.20650000
2007-07-01	18425938754.93990000
2007-10-01	5820545271.00417000
2008-01-01	9187295230.70081100
2008-04-01	18053597049.25180000
2008-07-01	-8910185768.68853000
2008-10-01	-264849484.05870000
2009-01-01	-4426769654.00487000
2009-04-01	-16187040806.59310200
2009-07-01	-8832458559.45141000
2009-10-01	-7172815222.71575000
2010-01-01	10734266309.99160000
2010-04-01	-6128433337.12475000
2010-07-01	19535074112.82819700
2010-10-01	-15590867094.78790000
2011-01-01	-2448089350.37034000
2011-04-01	-8044641009.01868000
2011-07-01	7745561478.44788100
2011-10-01	-6019362432.70344100
2012-01-01	13079925641.09350000
2012-04-01	8017581419.72825000
2012-07-01	-9812627977.41779000
2012-10-01	-8593888990.69798900
2013-01-01	24574860340.29140000
2013-04-01	-14566669434.36960000
2013-07-01	-333314251.57944600
2013-10-01	10916421768.18280000
2014-01-01	-7545881501.92081000
2014-04-01	-6668736838.38980000
2014-07-01	-8646867735.51340100
2014-10-01	6870868230.10290050
2015-01-01	-140309024.85433897
2015-04-01	-7040000563.63856000
2015-07-01	4762307272.77381000
2015-10-01	-1201338595.28674000
2016-01-01	12061667315.42080000
2016-04-01	6274933916.75236000
2016-07-01	6464573540.50640000
2016-10-01	-663687097.62722490
2017-01-01	22863526164.96590000
2017-04-01	-14140737984.60990000
2017-07-01	5644516396.12980100
2017-10-01	17145703968.07260100
2018-01-01	-12631292986.08940000
2018-04-01	-7810438634.71878050
2018-07-01	-2702322135.97147000