Quarter	Billions of US Dollars
2002-04-01	0.20
2002-07-01	0.20
2002-10-01	0.20
2003-01-01	0.20
2007-01-01	0.20
2007-04-01	0.20
2007-07-01	0.20
2007-10-01	0.20
2008-04-01	0.30
2008-07-01	0.30
2008-10-01	0.30
2009-01-01	0.30
2010-01-01	0.25
2010-04-01	0.25
2010-07-01	0.25
2010-10-01	0.25
2011-01-01	0.25
2011-04-01	0.25
2011-07-01	0.25
2011-10-01	0.25
2012-01-01	0.25
2012-04-01	0.25
2012-07-01	0.25
2012-10-01	0.25
2013-01-01	0.25
2013-04-01	0.25
2013-07-01	0.25
2013-10-01	0.25