Quarter	Billions of US Dollars
2001-07-01	0.13455
2002-01-01	0.01796
2004-04-01	0.01099
2006-07-01	0.00139
2007-07-01	0.03029
2007-10-01	0.08353
2008-01-01	0.07596
2008-04-01	0.12200
2008-07-01	0.12237
2009-01-01	0.11915
2009-04-01	0.18983
2009-07-01	0.16233
2009-10-01	0.11732
2010-01-01	0.23750
2010-04-01	0.22742
2010-07-01	0.26699
2010-10-01	0.27335
2011-01-01	0.24376
2011-04-01	0.26552
2011-07-01	0.26159
2011-10-01	0.22189