Quarter	Billions of US Dollars
1975-04-01	0.05340
1975-07-01	0.02500
1978-07-01	0.02500
1979-01-01	0.04850
1979-04-01	0.03500
1980-07-01	0.08110
1980-10-01	0.02920
1981-04-01	0.03000
1991-01-01	0.32000
1993-04-01	0.33260
1993-10-01	0.10000
1994-10-01	0.10000
1995-10-01	0.30000
1996-01-01	0.45000
1996-04-01	0.72000
1996-07-01	0.44000
1996-10-01	0.80000
1997-01-01	0.75000
1997-07-01	1.05000
1998-04-01	0.65000
1998-10-01	0.41300
1999-01-01	0.60000
1999-04-01	0.88250
1999-07-01	0.20379
2000-07-01	0.30000
2001-01-01	0.32000
2001-04-01	0.46500
2001-07-01	0.82100
2001-10-01	0.65000
2002-04-01	0.86392
2002-07-01	0.38000
2002-10-01	0.82500
2003-01-01	1.00000
2003-04-01	0.45000
2003-07-01	0.90000
2003-10-01	0.85000
2004-01-01	1.15000
2004-10-01	1.20000
2005-04-01	0.40000
2005-07-01	0.50000
2006-01-01	0.20000
2006-04-01	0.20000
2006-07-01	0.20000
2006-10-01	0.50000
2007-01-01	0.25000
2007-10-01	0.06500
2008-04-01	0.09969
2008-07-01	0.40250
2009-01-01	0.60000
2009-04-01	0.48300
2009-07-01	0.70000
2009-10-01	1.85137
2010-01-01	0.50000
2010-04-01	0.88000
2010-07-01	4.22852
2010-10-01	2.05681
2011-01-01	2.33966
2011-04-01	0.30000
2011-07-01	1.65151
2011-10-01	1.78500
2012-01-01	1.35000
2012-04-01	0.50314
2012-07-01	3.48756
2012-10-01	4.33423
2013-01-01	3.40900
2013-04-01	2.62103
2013-07-01	2.00328
2013-10-01	3.66877
2014-01-01	1.27191
2014-04-01	1.93209
2014-07-01	5.44417
2014-10-01	5.98334
2015-01-01	1.00014
2015-04-01	4.94313