Quarter	Billions of US Dollars
2006-07-01	0.09701
2006-10-01	0.12173
2007-01-01	0.06697
2007-07-01	0.04570
2007-10-01	0.02222
2008-01-01	0.12308
2008-04-01	0.12061
2008-07-01	0.21518
2009-01-01	0.01998
2009-04-01	0.06470
2009-07-01	0.01321
2009-10-01	0.03779
2011-10-01	0.02067