Quarter	US Dollars, sum over component sub-periods
2006-01-01	90485717519.18930
2006-04-01	88482499139.56079
2006-07-01	91061676812.04959
2006-10-01	95137918342.80800
2007-01-01	105087421461.42000
2007-04-01	97698452051.26400
2007-07-01	103174583211.48401
2007-10-01	114179338865.66699
2008-01-01	124620777515.49600
2008-04-01	120345157708.65099
2008-07-01	121376127882.49301
2008-10-01	120243071007.56800
2009-01-01	113027500143.93100
2009-04-01	115728191941.25600
2009-07-01	117873913293.06200
2009-10-01	121970771776.53401
2010-01-01	123584118835.00801
2010-04-01	114347963624.38899
2010-07-01	121727261502.72900
2010-10-01	128896508722.85100
2011-01-01	132754632795.39699
2011-04-01	136773285496.57800
2011-07-01	138423390200.90600
2011-10-01	143901456237.01498
2012-01-01	142819724739.66302
2012-04-01	140654675634.27900
2012-07-01	140564405166.27002
2012-10-01	149467341610.55100
2013-01-01	148933692478.64700
2013-04-01	152061759176.81497
2013-07-01	156149759492.00497
2013-10-01	163171935157.67000
2014-01-01	157738936119.10600
2014-04-01	160003183126.21802
2014-07-01	157891135584.15000
2014-10-01	157868713887.14500
2015-01-01	156811973991.71800
2015-04-01	150306198439.59900
2015-07-01	157515699395.48500
2015-10-01	159951494635.99002
2016-01-01	158433368185.71100
2016-04-01	153822407702.35000
2016-07-01	158948801005.15000
2016-10-01	165151986087.01600
2017-01-01	166557041842.06100
2017-04-01	169334095421.31200
2017-07-01	172627618019.80298
2017-10-01	173963284340.91400