Quarter	Billions of US Dollars
2006-10-01	0.00504
2007-01-01	0.01034
2007-04-01	0.00986
2007-07-01	0.00990
2007-10-01	0.01430
2008-01-01	0.01425
2008-04-01	0.00431
2008-07-01	0.00434
2009-01-01	0.14961
2009-04-01	0.04667
2009-07-01	0.04879
2009-10-01	0.04960
2010-01-01	0.03027
2011-04-01	0.00699
2011-07-01	0.00689
2011-10-01	0.00687
2012-01-01	0.00690
2012-10-01	0.25945
2013-01-01	0.15957
2013-04-01	0.15872
2013-07-01	0.15649
2013-10-01	0.12109
2014-01-01	0.10247
2014-04-01	0.10165
2014-07-01	0.10256
2014-10-01	0.15580
2015-01-01	0.10457
2015-04-01	0.07446