Quarter	Billions of US Dollars
1994-01-01	0.04000
1997-01-01	-0.04000
1998-01-01	0.00500
1998-10-01	0.15000
1999-07-01	-0.00070
1999-10-01	-0.00081
2000-10-01	-0.00349
2006-07-01	0.21300
2006-10-01	0.85900
2008-10-01	-0.15000
2009-01-01	0.25000
2009-10-01	0.15000
2010-01-01	0.29000
2010-10-01	0.10000
2011-01-01	0.08500
2011-07-01	-0.22500
2012-01-01	0.40000
2012-07-01	0.30000
2012-10-01	0.10000
2013-01-01	0.50000
2013-10-01	0.23000
2014-04-01	0.58103
2014-07-01	0.65055
2014-10-01	0.77177
2015-01-01	-0.25000
2015-04-01	1.15492