Quarter	Billions of US Dollars
1996-10-01	0.07500
1997-10-01	-0.00488
1999-10-01	-0.07012
2005-07-01	0.50000
2006-07-01	0.15000
2006-10-01	0.20000
2007-04-01	0.12500
2009-01-01	-0.01429
2009-07-01	-0.01428
2010-01-01	-0.01429
2010-07-01	-0.01428
2011-01-01	-0.01429
2011-07-01	-0.01428
2011-10-01	0.57407
2012-01-01	0.25000
2012-07-01	-0.46429
2013-01-01	1.30000
2013-07-01	-0.02857
2014-01-01	-0.01429
2014-07-01	-0.01429
2015-01-01	0.92500