Quarter	Billions of US Dollars
1975-10-01	0.01750
1978-07-01	0.10420
1979-01-01	0.03730
1979-07-01	0.02540
1980-07-01	0.04550
1981-04-01	0.04640
1981-10-01	0.02500
1982-04-01	0.20000
1982-07-01	0.03730
1982-10-01	0.07500
1983-01-01	0.03650
1983-07-01	0.29240
1986-01-01	0.30000
1988-10-01	0.16080
1990-07-01	0.33000
1990-10-01	0.26000
1991-01-01	0.20000
1991-04-01	0.13500
1991-10-01	0.03340
1992-01-01	0.07590
1992-04-01	0.04210
1992-07-01	0.37850
1993-01-01	0.03000
1993-10-01	0.55500
1994-04-01	1.12500
1994-07-01	0.32400
1994-10-01	0.07500
1995-01-01	0.02000
1995-07-01	0.30460
1995-10-01	0.23400
1996-01-01	0.20426
1996-04-01	0.25938
1996-07-01	0.96228
1996-10-01	0.53448
1997-01-01	0.84338
1997-04-01	0.30701
1997-07-01	0.12044
1997-10-01	0.25545
1998-01-01	0.00059
1998-04-01	0.53173
1998-07-01	0.01323
1998-10-01	0.63016
1999-01-01	0.46787
1999-04-01	0.70735
2000-01-01	0.79127
2001-01-01	0.01201
2002-04-01	0.15000
2002-07-01	0.50000
2002-10-01	0.15000
2003-01-01	0.35500
2003-04-01	0.93664
2003-07-01	0.34235
2004-01-01	1.42500
2004-04-01	0.02528
2004-10-01	0.03822
2005-01-01	0.20000
2005-04-01	1.00000
2005-07-01	0.14741
2005-10-01	1.72027
2006-01-01	2.00000
2006-10-01	0.11000
2007-01-01	1.55000
2007-04-01	1.02500
2007-07-01	0.15000
2008-01-01	2.00000
2008-04-01	2.20000
2009-01-01	5.00000
2009-04-01	0.75000
2009-07-01	0.93364
2009-10-01	1.41500
2010-01-01	2.86000
2010-04-01	0.25000
2010-10-01	0.64388
2011-01-01	0.18000
2011-04-01	4.11500
2011-10-01	3.00000
2012-01-01	4.15000
2012-04-01	5.50000
2012-10-01	2.76412
2013-01-01	1.35000
2013-04-01	5.58000
2013-07-01	2.70000
2013-10-01	0.15000
2014-01-01	4.03000
2014-04-01	2.85000
2014-07-01	4.73540
2014-10-01	0.28750
2015-01-01	6.91645
2015-04-01	8.12721