Quarter	Billions of US Dollars
2006-07-01	0.79125
2006-10-01	0.82313
2007-01-01	0.83238
2007-04-01	1.35050
2007-07-01	0.53171
2007-10-01	0.55204
2008-01-01	0.59295
2008-04-01	0.03153
2008-07-01	0.02861
2008-10-01	0.02783
2009-01-01	0.02662