Quarter	Billions of US Dollars
1987-01-01	0.25700
1987-04-01	0.16600
1987-07-01	0.24400
1987-10-01	0.29000
1988-01-01	0.34700
1988-04-01	0.20800
1988-07-01	0.26400
1988-10-01	0.25800
1989-01-01	0.14300
1989-04-01	0.12700
1989-07-01	0.16800
1989-10-01	0.17100
1990-01-01	0.12000
1990-04-01	0.05700
1990-07-01	0.02700
1990-10-01	0.01500
1991-01-01	0.01000
1991-04-01	0.01500
1991-07-01	0.02000
1991-10-01	0.02000
1992-01-01	0.02000
1992-04-01	0.04300
1992-07-01	0.02300
1992-10-01	0.03300
1993-01-01	0.03500
1993-04-01	0.03500
1993-07-01	0.07681
1993-10-01	0.09921
1994-01-01	0.11791
1994-04-01	0.11245
1994-07-01	0.06950
1994-10-01	0.04650
1995-01-01	0.03150
1995-04-01	0.02250
1995-07-01	0.02250
1995-10-01	0.01250
1996-01-01	0.01250
1996-04-01	0.01750
1996-07-01	0.00750
1996-10-01	0.00750
1997-01-01	0.02750
1997-04-01	0.02250
1997-07-01	0.02750
1997-10-01	0.02250
1998-01-01	0.01750
1998-04-01	0.02250
1998-07-01	0.00750
1998-10-01	0.00750
1999-01-01	0.00500
1999-04-01	0.01500
1999-07-01	0.01500
1999-10-01	0.01500
2000-01-01	0.01500
2000-04-01	0.02000
2000-07-01	0.01500
2000-10-01	0.01500
2001-01-01	0.01500
2001-04-01	0.01000
2001-07-01	0.02000
2001-10-01	0.04000
2002-01-01	0.02500
2002-04-01	0.02000
2002-07-01	0.00500
2003-04-01	0.01000
2003-07-01	0.02000
2003-10-01	0.02000
2004-01-01	0.03000
2004-04-01	0.02000
2004-10-01	0.01350
2005-01-01	0.03350
2005-04-01	0.01350
2005-07-01	0.03350
2005-10-01	0.02000
2006-01-01	0.02000
2006-04-01	0.02000
2006-07-01	0.03000
2006-10-01	0.01000
2007-01-01	0.01000
2007-04-01	0.01000
2007-10-01	0.07500
2008-01-01	0.10000
2008-04-01	0.05500
2012-01-01	0.14670
2012-04-01	0.14670
2012-07-01	0.14670
2012-10-01	0.14670
2013-10-01	0.10000
2014-01-01	0.10000
2014-04-01	0.10000
2014-07-01	0.10000