Quarter	Billions of US Dollars
1996-01-01	0.05877
2001-01-01	-0.05272
2006-01-01	0.08729
2006-04-01	0.06397
2006-07-01	0.00006
2006-10-01	0.01755
2007-01-01	0.04837
2007-04-01	-0.02091
2007-07-01	1.06577
2007-10-01	0.16312
2008-01-01	-0.09113
2008-04-01	0.04807
2009-01-01	0.09002
2010-01-01	-0.16937
2010-04-01	0.01292
2010-07-01	-0.01055
2010-10-01	0.00608
2012-07-01	-0.98943
2012-10-01	-0.22268