Quarter	Billions of US Dollars
2010-07-01	0.12884
2010-10-01	0.18863
2011-01-01	0.69053
2011-04-01	0.51465
2011-07-01	0.50306
2011-10-01	0.45907
2012-01-01	0.50123
2012-04-01	0.71961
2012-07-01	0.75017
2012-10-01	0.93355
2013-01-01	0.87117
2013-04-01	0.71375
2013-07-01	0.41469
2013-10-01	0.61509
2014-01-01	0.98047
2014-04-01	1.68265
2014-07-01	1.91359
2014-10-01	1.66594
2015-01-01	1.16570
2015-04-01	0.99630