Quarter	Billions of US Dollars
1972-10-01	0.0100
1973-01-01	0.0240
1973-04-01	0.0240
1973-07-01	0.0240
1973-10-01	0.0240
1974-01-01	0.0240
1974-04-01	0.0240
1974-07-01	0.0240
1974-10-01	0.0240
1975-01-01	0.0240
1975-04-01	0.0240
1975-07-01	0.0240
1975-10-01	0.0240
1976-01-01	0.0240
1976-04-01	0.0240
1976-07-01	0.0240
1976-10-01	0.0240
1977-01-01	0.0240
1977-04-01	0.0240
1977-07-01	0.0240
1977-10-01	0.0240
1978-01-01	0.0240
1978-04-01	0.0240
1978-07-01	0.0240
1978-10-01	0.0240
1979-01-01	0.0240
1979-04-01	0.0240
1979-07-01	0.0240
1979-10-01	0.0140
1980-01-01	0.0140
1980-04-01	0.0140
1980-07-01	0.0140
1980-10-01	0.0140
1981-01-01	0.0140
1981-04-01	0.0140
1981-07-01	0.0140
1981-10-01	0.0140
1982-01-01	0.0140
1982-04-01	0.0140
1982-07-01	0.0140
1982-10-01	0.0140
1983-01-01	0.0140
1983-04-01	0.0140
1983-07-01	0.0140
1983-10-01	0.0140
1984-01-01	0.0140
1984-04-01	0.0140
1984-07-01	0.0140
1984-10-01	0.0140
1985-01-01	0.0140
1985-04-01	0.0140
1985-07-01	0.0140
1985-10-01	0.0140
1986-01-01	0.0140
1986-04-01	0.0140
1986-07-01	0.0140
1986-10-01	0.0140
1987-01-01	0.0140
1987-04-01	0.0140
1987-07-01	0.0140
1987-10-01	0.0140
1996-10-01	0.0750
1997-01-01	0.0750
1997-04-01	0.0750
1997-07-01	0.2750
1997-10-01	0.2701
1998-01-01	0.2701
1998-04-01	0.5201
1998-07-01	0.5201
1998-10-01	0.5201
1999-01-01	0.5201
1999-04-01	0.5201
1999-07-01	0.5201
1999-10-01	0.4500
2000-01-01	0.6411
2000-04-01	0.6411
2000-07-01	0.8503
2000-10-01	0.8611
2001-01-01	1.0062
2001-04-01	1.3930
2001-07-01	1.4174
2001-10-01	1.6555
2002-01-01	1.6522
2002-04-01	1.9991
2002-07-01	1.7947
2002-10-01	1.8183
2003-01-01	1.6157
2003-04-01	1.6250
2003-07-01	1.6289
2003-10-01	1.6460
2004-01-01	1.8834
2004-04-01	2.0058
2004-07-01	2.0464
2004-10-01	2.2992
2005-01-01	2.2630
2005-04-01	2.2651
2005-07-01	2.7623
2005-10-01	2.9988
2006-01-01	3.3657
2006-04-01	3.3992
2006-07-01	3.7263
2006-10-01	3.9544
2007-01-01	5.7125
2007-04-01	5.8478
2007-07-01	5.6598
2007-10-01	5.8397
2008-01-01	5.8997
2008-04-01	6.2470
2008-07-01	6.1667
2008-10-01	6.1454
2009-01-01	6.1665
2009-04-01	6.1954
2009-07-01	6.3589
2009-10-01	6.8506
2010-01-01	7.5789
2010-04-01	7.5366
2010-07-01	7.5705
2010-10-01	7.8605
2011-01-01	8.2758
2011-04-01	7.8844
2011-07-01	7.8369
2011-10-01	8.3912
2012-01-01	8.6558
2012-04-01	8.6290
2012-07-01	9.4180
2012-10-01	8.0220
2013-01-01	9.2161
2013-04-01	9.2203
2013-07-01	9.1981
2013-10-01	9.7024
2014-01-01	9.6880
2014-04-01	10.1911
2014-07-01	10.9607
2014-10-01	10.7719
2015-01-01	11.6969
2015-04-01	10.5969