Quarter	Billions of US Dollars
2005-10-01	0.00590
2006-01-01	0.00605
2006-04-01	0.00636
2006-07-01	0.00633
2007-04-01	0.13505
2007-07-01	0.14179
2007-10-01	0.14721
2008-01-01	0.15812
2010-04-01	0.24542
2010-07-01	0.27296
2010-10-01	0.26724
2011-01-01	0.28414