Quarter	Billions of US Dollars
2006-07-01	0.01800
2006-10-01	0.01800
2007-01-01	0.61800
2007-04-01	1.26800
2007-07-01	3.76800
2007-10-01	3.76800
2008-01-01	3.76800
2008-04-01	3.76800
2008-07-01	3.76800
2008-10-01	4.81177
2009-01-01	4.76610
2009-04-01	4.82805
2009-07-01	4.86623
2009-10-01	4.84845
2010-01-01	4.62892
2010-04-01	4.53832
2010-07-01	4.64160
2010-10-01	5.62015
2011-01-01	5.68353
2011-04-01	5.70197
2011-07-01	5.63073
2011-10-01	6.58840
2012-01-01	6.61967
2012-04-01	5.91222
2012-07-01	4.93772
2012-10-01	4.95752
2013-01-01	4.92835
2013-04-01	5.40797
2013-07-01	5.44085
2013-10-01	6.75230
2014-01-01	6.75207
2014-04-01	7.14232
2014-07-01	7.06170
2014-10-01	7.02855
2015-01-01	6.47490
2015-04-01	6.51777