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
1988-07-01	-0.05359
1988-10-01	0.08280
1990-04-01	-0.04622
1992-04-01	-0.09292
1993-10-01	-0.08915
1994-04-01	-0.15000
1994-07-01	-0.10000
1995-07-01	0.06000
1996-07-01	0.06000
1997-07-01	0.20000
1998-07-01	-0.06000
2001-07-01	-0.06000
2002-04-01	0.32500
2002-07-01	-0.20000
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	2.09549
2007-10-01	-0.10228
2008-01-01	-0.15000
2008-04-01	-0.23670
2009-04-01	0.50000
2009-07-01	-0.02700
2009-10-01	0.53330
2010-01-01	1.23800
2010-04-01	0.23014
2010-10-01	0.12782
2011-01-01	-0.70000
2011-04-01	-0.01330
2011-07-01	-0.30000
2011-10-01	1.17990
2012-01-01	-0.56657
2012-04-01	-0.66000
2012-07-01	1.50000
2012-10-01	0.60627
2013-01-01	0.15000
2013-04-01	0.69929
2013-07-01	1.50000
2013-10-01	0.48218
2014-01-01	0.04790
2014-04-01	-0.47201
2014-07-01	1.44000
2014-10-01	-0.15069
2015-01-01	0.32444
2015-04-01	-0.47860