Quarter	Billions of US Dollars
2006-07-01	0.01798
2006-10-01	0.10351
2007-01-01	0.03832
2007-04-01	0.06677
2007-07-01	0.05020
2007-10-01	0.02867
2008-01-01	0.01935
2008-04-01	0.04531
2008-07-01	0.03112
2011-07-01	0.00700
2011-10-01	0.12246
2012-01-01	0.02000
2012-04-01	0.16891
2012-07-01	0.14980
2012-10-01	0.09505
2013-01-01	0.04640
2013-04-01	0.18757
2013-07-01	0.20650
2013-10-01	0.16753
2014-01-01	0.11725
2014-04-01	0.10113
2014-07-01	0.16174
2014-10-01	0.09330
2015-01-01	0.06929
2015-04-01	0.08771