Quarter	Billions of US Dollars
2006-07-01	0.06330
2006-10-01	0.06585
2007-01-01	0.06659
2007-04-01	0.06753
2009-04-01	0.24734
2009-07-01	0.25625
2009-10-01	0.25211
2010-01-01	0.23588
2010-10-01	0.05000
2011-01-01	0.05000
2011-04-01	0.05000
2011-07-01	0.05000