Quarter	Billions of US Dollars
1978-01-01	0.02000
1978-04-01	0.02000
1978-07-01	0.02000
1978-10-01	0.02000
1979-01-01	0.02000
1979-04-01	0.02000
1979-07-01	0.02000
1979-10-01	0.02000
1980-01-01	0.02000
1980-04-01	0.07000
1980-07-01	0.08211
1980-10-01	0.12686
1981-01-01	0.12423
1981-04-01	0.12076
1981-07-01	0.12167
1981-10-01	0.12330
1982-01-01	0.12105
1982-04-01	0.11983
1982-07-01	0.11901
1982-10-01	0.12107
1983-01-01	0.12021
1983-04-01	0.11917
1983-07-01	0.11834
1983-10-01	0.11753
1984-01-01	0.11859
1984-04-01	0.11654
1984-07-01	0.11453
1984-10-01	0.11362
1985-01-01	0.09381
1985-04-01	0.04414
1985-07-01	0.04790
1985-10-01	0.00905
1986-01-01	0.00969
1986-04-01	0.01047
1986-07-01	0.01148
1986-10-01	0.01158
1987-01-01	0.01248
1987-04-01	0.01237
1987-07-01	0.01230
1987-10-01	0.01471
1988-01-01	0.01374
1988-04-01	0.01245
1988-07-01	0.01183
1988-10-01	0.01250
1989-01-01	0.01133
1989-04-01	0.01124
1989-07-01	0.01162
1989-10-01	0.01216
1990-01-01	0.01256
1990-04-01	0.57825
1990-07-01	0.57946
1990-10-01	0.56499
1991-01-01	0.56499
1991-04-01	0.56499
1991-07-01	0.56499
1991-10-01	0.56499
1992-01-01	0.56499
1992-04-01	0.56499
1992-07-01	0.56499
1992-10-01	0.56499
1993-01-01	0.56499
1993-04-01	0.56499
1993-07-01	0.56499
1993-10-01	0.56499
1994-01-01	0.61499
1994-04-01	0.61499
1994-07-01	0.61499
1994-10-01	0.61499
1995-01-01	0.61499
1995-04-01	0.61499
1995-07-01	0.61499
1995-10-01	0.61499
1996-01-01	0.61499
1996-04-01	0.61499
1996-07-01	0.61499
1996-10-01	0.54838
1997-01-01	0.49838
1997-04-01	0.49838
1997-07-01	0.49838
1997-10-01	0.49838
1998-01-01	0.49838
1998-04-01	0.69838
1998-07-01	0.69838
1998-10-01	0.63120
1999-01-01	0.63120
1999-04-01	0.93120
1999-07-01	0.93120
1999-10-01	0.93120
2000-01-01	0.93120
2000-04-01	0.92894
2000-07-01	1.17894
2000-10-01	1.16855
2001-01-01	1.41855
2001-04-01	1.40116
2001-07-01	1.40116
2001-10-01	1.39077
2002-01-01	1.64077
2002-04-01	1.63038
2002-07-01	1.63038
2002-10-01	1.61998
2003-01-01	2.06998
2003-04-01	1.71411
2003-07-01	1.71411
2003-10-01	1.75411
2004-01-01	1.85000
2004-04-01	1.85000
2004-07-01	1.85000
2004-10-01	1.85000
2005-01-01	1.85000
2005-04-01	1.85000
2005-07-01	1.85000
2005-10-01	1.85000
2006-01-01	1.85000
2006-04-01	1.85000
2006-07-01	1.85000
2006-10-01	1.85000
2007-01-01	1.85000
2007-04-01	1.85000
2007-07-01	1.85000
2007-10-01	1.85000
2008-01-01	1.65000
2008-04-01	1.65000
2008-07-01	1.65000
2008-10-01	1.65000
2009-01-01	1.65000
2009-04-01	1.35000
2009-07-01	1.35000
2009-10-01	1.35000
2010-01-01	1.35000
2010-04-01	1.35000
2010-07-01	1.35000
2010-10-01	1.35000
2011-01-01	1.10000
2011-04-01	1.10000
2011-07-01	1.10000
2011-10-01	1.35000
2012-01-01	1.10000
2012-04-01	1.35000
2012-07-01	1.35000
2012-10-01	2.35000
2013-01-01	2.10000
2013-04-01	3.60000
2013-07-01	4.10000
2013-10-01	5.06000
2014-01-01	4.75000
2014-04-01	5.75000
2014-07-01	5.75000
2014-10-01	5.75000
2015-01-01	6.75000
2015-04-01	6.75000