Quarter	Billions of US Dollars
1966-01-01	0.02
1966-04-01	0.02
1966-07-01	0.02
1966-10-01	0.02
1967-01-01	0.02
1967-04-01	0.02
1967-07-01	0.02
1967-10-01	0.02
1968-01-01	0.13
1968-04-01	0.19
1968-07-01	0.21
1968-10-01	0.21
1969-01-01	0.21
1969-04-01	0.21
1969-07-01	0.21
1969-10-01	0.21
1970-01-01	0.21
1970-04-01	0.21
1970-07-01	0.21
1970-10-01	0.21
1971-01-01	0.21
1971-04-01	0.21
1971-07-01	0.21
1971-10-01	0.21
1972-01-01	0.21
1972-04-01	0.21
1972-07-01	0.24
1972-10-01	0.24
1973-01-01	0.24
1973-04-01	0.25
1973-07-01	0.25
1973-10-01	0.24
1974-01-01	0.25
1974-04-01	0.25
1974-07-01	0.25
1974-10-01	0.25
1975-01-01	0.25
1975-04-01	0.25
1975-07-01	0.25
1975-10-01	0.27
1976-01-01	0.27
1976-04-01	0.27
1976-07-01	0.27
1976-10-01	0.27
1977-01-01	0.29
1977-04-01	0.29
1977-07-01	0.30
1977-10-01	0.39
1978-01-01	0.40
1978-04-01	0.40
1978-07-01	0.70
1978-10-01	0.73
1979-01-01	0.80
1979-04-01	0.80
1979-07-01	0.83
1979-10-01	0.82
1980-01-01	0.78
1980-04-01	0.82
1980-07-01	0.81
1980-10-01	0.76
1981-01-01	0.74
1981-04-01	0.71
1981-07-01	0.72
1981-10-01	0.74
1982-01-01	0.71
1982-04-01	0.70
1982-07-01	0.69
1982-10-01	0.71
1983-01-01	0.73
1983-04-01	0.80
1983-07-01	0.89
1983-10-01	1.08
1984-01-01	1.07
1984-04-01	1.09
1984-07-01	1.08
1984-10-01	1.21
1985-01-01	1.37
1985-04-01	1.69
1985-07-01	2.25
1985-10-01	2.56
1986-01-01	3.14
1986-04-01	3.91
1986-07-01	4.59
1986-10-01	4.74
1987-01-01	5.17
1987-04-01	5.65
1987-07-01	6.61
1987-10-01	8.34
1988-01-01	8.45
1988-04-01	9.17
1988-07-01	9.73
1988-10-01	10.70
1989-01-01	11.74
1989-04-01	12.18
1989-07-01	13.48
1989-10-01	14.66
1990-01-01	15.48
1990-04-01	16.26
1990-07-01	19.19
1990-10-01	19.74
1991-01-01	20.13
1991-04-01	20.81
1991-07-01	22.00
1991-10-01	23.62
1992-01-01	23.62
1992-04-01	25.67
1992-07-01	28.25
1992-10-01	26.87
1993-01-01	27.01
1993-04-01	27.38
1993-07-01	33.04
1993-10-01	36.55
1994-01-01	39.23
1994-04-01	43.51
1994-07-01	45.79
1994-10-01	49.50
1995-01-01	54.93
1995-04-01	62.06
1995-07-01	65.55
1995-10-01	67.93
1996-01-01	73.87
1996-04-01	83.62
1996-07-01	87.29
1996-10-01	103.13
1997-01-01	109.00
1997-04-01	119.75
1997-07-01	138.11
1997-10-01	154.35
1998-01-01	164.85
1998-04-01	181.05
1998-07-01	197.56
1998-10-01	207.33
1999-01-01	213.45
1999-04-01	226.93
1999-07-01	245.45
1999-10-01	254.19
2000-01-01	265.53
2000-04-01	273.40
2000-07-01	285.36
2000-10-01	302.81
2001-01-01	313.64
2001-04-01	332.58
2001-07-01	359.59
2001-10-01	362.07
2002-01-01	367.71
2002-04-01	411.02
2002-07-01	409.51
2002-10-01	420.54
2003-01-01	425.71
2003-04-01	438.95
2003-07-01	448.59
2003-10-01	463.15
2004-01-01	464.00
2004-04-01	458.15
2004-07-01	465.15
2004-10-01	493.21
2005-01-01	476.27
2005-04-01	462.53
2005-07-01	466.06
2005-10-01	502.10
2006-01-01	553.80
2006-04-01	614.02
2006-07-01	688.38
2006-10-01	820.25
2007-01-01	913.00
2007-04-01	1012.88
2007-07-01	1089.38
2007-10-01	1120.90
2008-01-01	1159.22
2008-04-01	1153.48
2008-07-01	1127.96
2008-10-01	1121.00
2009-01-01	1100.51
2009-04-01	1124.98
2009-07-01	1137.93
2009-10-01	1129.83
2010-01-01	1116.11
2010-04-01	1101.46
2010-07-01	1131.61
2010-10-01	1139.46
2011-01-01	1141.66
2011-04-01	1138.19
2011-07-01	1127.07
2011-10-01	1127.21
2012-01-01	1147.53
2012-04-01	1145.29
2012-07-01	1163.68
2012-10-01	1185.77
2013-01-01	1185.39
2013-04-01	1204.34
2013-07-01	1215.75
2013-10-01	1231.85
2014-01-01	1248.56
2014-04-01	1284.42
2014-07-01	1287.66
2014-10-01	1294.08
2015-01-01	1295.69
2015-04-01	1314.03