Quarter	Billions of US Dollars
1996-01-01	0.25
1996-04-01	0.25
1996-07-01	0.25
1996-10-01	0.25
1997-01-01	0.25
1997-04-01	0.25
1997-07-01	0.25
1997-10-01	0.25
1998-01-01	0.25
1998-04-01	0.25
1998-07-01	0.25
1998-10-01	0.25
1999-01-01	0.25
1999-04-01	0.25
1999-07-01	0.25
1999-10-01	0.25
2000-01-01	0.25
2000-04-01	0.25
2000-07-01	0.25
2000-10-01	0.25
2001-01-01	0.25
2001-04-01	0.25
2001-07-01	0.25
2001-10-01	0.25
2002-01-01	0.25
2002-04-01	0.25
2007-10-01	0.75
2008-01-01	0.75
2008-04-01	0.75
2008-07-01	0.75
2008-10-01	0.75
2009-01-01	0.75
2009-04-01	0.75
2009-07-01	0.75
2009-10-01	0.75
2010-01-01	0.75
2010-04-01	0.75
2010-07-01	0.75
2010-10-01	0.75
2011-01-01	0.75
2011-04-01	0.75
2011-07-01	0.75
2011-10-01	0.75
2012-01-01	0.75
2012-04-01	0.75
2012-07-01	0.75
2012-10-01	0.75
2013-01-01	0.75
2013-04-01	0.75
2013-07-01	1.75
2013-10-01	1.75
2014-01-01	1.75
2014-04-01	1.75
2014-07-01	3.75
2014-10-01	3.75
2015-01-01	3.75
2015-04-01	3.75