Quarter	Billions of US Dollars
1973-01-01	0.02000
1973-07-01	0.02500
1980-01-01	0.05500
1986-07-01	0.03880
1987-04-01	0.05000
1991-04-01	0.20000
1993-04-01	0.27500
1993-10-01	0.20760
1994-01-01	0.25000
1994-07-01	0.12500
1994-10-01	0.00650
1995-01-01	0.01561
1995-04-01	0.14166
1995-07-01	0.14770
1995-10-01	0.25319
1996-01-01	0.68479
1996-04-01	0.93906
1996-07-01	1.01283
1996-10-01	0.30468
1997-01-01	1.00000
1997-04-01	0.16500
1997-10-01	0.15000
1998-01-01	0.88769
1998-04-01	0.15000
1998-07-01	0.65000
1999-01-01	0.50000
1999-04-01	0.50000
1999-10-01	0.50000
2000-01-01	0.75000
2000-04-01	0.28002
2000-07-01	0.27129
2000-10-01	0.34757
2001-01-01	0.92280
2001-04-01	2.18319
2001-07-01	0.50300
2001-10-01	1.00000
2002-04-01	0.50000
2002-10-01	0.50000
2003-01-01	0.50000
2003-04-01	0.25000
2003-07-01	0.55810
2003-10-01	0.50000
2004-01-01	0.50000
2004-04-01	0.04500
2004-07-01	0.50000
2004-10-01	0.54381
2005-01-01	0.44706
2005-04-01	0.33500
2005-07-01	1.00000
2005-10-01	0.84302
2006-01-01	0.23809
2006-04-01	0.17000
2006-07-01	2.30009
2006-10-01	0.46840
2007-04-01	1.40441
2007-07-01	0.30087
2007-10-01	0.71000
2008-01-01	1.00000
2009-01-01	1.00000
2009-04-01	1.00000
2009-07-01	2.00000
2009-10-01	1.50300
2010-04-01	0.79641
2010-07-01	1.66638
2011-01-01	1.59541
2011-04-01	1.30000
2011-07-01	2.00000
2011-10-01	1.21000
2012-01-01	2.25000
2012-04-01	1.34000
2012-07-01	2.74885
2013-01-01	2.29933
2013-04-01	0.30000
2013-07-01	4.10000
2013-10-01	0.13900
2014-01-01	2.00000
2014-04-01	2.50000
2014-07-01	2.50251
2014-10-01	1.00000
2015-01-01	3.00000
2015-04-01	1.90000