Quarter	Billions of US Dollars
2006-10-01	0.09210
2007-04-01	0.01938
2007-10-01	-0.10145
2008-01-01	0.00300
2010-04-01	-0.01653
2010-07-01	1.00000
2010-10-01	0.22518
2011-01-01	0.79700
2012-10-01	-0.22522