Quarter	Billions of US Dollars
1994-01-01	0.0500
1997-01-01	-0.0500
1997-10-01	0.0076
1998-04-01	-0.0076
2003-10-01	0.0400
2004-01-01	0.0600
2011-10-01	0.2500
2012-04-01	0.2500
2013-04-01	0.5000
2013-10-01	-0.0400
2014-01-01	-0.0600