Quarter	Billions of US Dollars
1983-07-01	0.03790
1984-01-01	0.10000
1985-04-01	0.19620
1987-04-01	0.08480
1988-10-01	0.08280
1995-07-01	0.06000
1996-04-01	0.06000
1997-04-01	0.20000
2002-04-01	0.32500
2003-01-01	0.50000
2003-04-01	0.25000
2004-04-01	0.25000
2005-07-01	0.40000
2005-10-01	0.50000
2006-01-01	0.50000
2006-07-01	0.30000
2006-10-01	0.10000
2007-04-01	2.42049
2008-01-01	0.35000
2008-04-01	0.01330
2009-04-01	0.75000
2009-10-01	0.53330
2010-01-01	1.25000
2010-04-01	0.75000
2010-10-01	0.52782
2011-10-01	1.17990
2012-04-01	1.50000
2012-07-01	0.09627
2012-10-01	0.51000
2013-01-01	0.50000
2013-04-01	0.69929
2013-07-01	1.50000
2013-10-01	0.50000
2014-01-01	0.18595
2014-04-01	0.13994
2014-07-01	1.44000
2014-10-01	0.15931
2015-01-01	0.42444
2015-04-01	0.40000