Quarter	Billions of US Dollars
1972-10-01	0.01000
1973-01-01	0.01400
1996-10-01	0.07500
1997-04-01	0.20000
1998-04-01	0.25000
2000-01-01	0.19598
2000-07-01	0.22500
2001-01-01	0.16567
2001-04-01	0.40000
2001-10-01	0.25000
2002-04-01	0.30000
2004-01-01	0.24789
2004-04-01	0.12500
2004-07-01	0.24777
2004-10-01	0.18624
2005-04-01	0.50000
2005-07-01	0.30000
2005-10-01	0.25000
2006-01-01	0.35000
2006-07-01	0.15000
2006-10-01	0.20000
2007-01-01	0.35000
2007-04-01	0.12500
2007-10-01	0.15000
2008-04-01	0.35000
2011-01-01	0.40000
2011-10-01	0.58836
2012-01-01	0.25000
2013-01-01	1.30000
2014-07-01	0.80000
2015-01-01	0.92500