Quarter	Billions of US Dollars
2003-10-01	0.20130
2004-01-01	0.08930
2004-07-01	0.24999
2006-07-01	0.39941
2006-10-01	0.29709
2007-01-01	0.51033
2007-04-01	0.50187
2008-04-01	0.18360
2011-10-01	1.31873
2012-04-01	0.02960
2012-07-01	0.00092
2013-10-01	0.07595
2014-01-01	0.01006
2014-10-01	0.02009
2015-01-01	0.03925
2015-04-01	0.00202