Quarter	Billions of US Dollars
2006-01-01	57.946
2006-04-01	61.095
2006-07-01	63.216
2006-10-01	67.171
2007-01-01	73.565
2007-04-01	73.999
2007-07-01	79.804
2007-10-01	87.312
2008-01-01	102.210
2008-04-01	112.793
2008-07-01	96.748
2008-10-01	81.700
2009-01-01	83.885
2009-04-01	99.350
2009-07-01	108.530
2009-10-01	104.377
2010-01-01	104.321
2010-04-01	94.109
2010-07-01	113.671
2010-10-01	107.561
2011-01-01	125.680
2011-04-01	128.668
2011-07-01	119.958
2011-10-01	114.205
2012-01-01	128.598
2012-04-01	118.892
2012-07-01	127.227
2012-10-01	136.464
2013-01-01	137.042
2013-04-01	135.734
2013-07-01	140.913
2013-10-01	146.008
2014-01-01	148.077
2014-04-01	146.156
2014-07-01	135.338
2014-10-01	132.245
2015-01-01	119.796