Quarter	Billions of US Dollars
1966-01-01	0.09
1966-04-01	0.12
1966-07-01	0.13
1966-10-01	0.13
1967-01-01	0.14
1967-04-01	0.25
1967-07-01	0.25
1967-10-01	0.27
1968-01-01	0.57
1968-04-01	1.06
1968-07-01	1.23
1968-10-01	1.32
1969-01-01	1.55
1969-04-01	1.56
1969-07-01	1.60
1969-10-01	1.76
1970-01-01	1.78
1970-04-01	1.80
1970-07-01	1.87
1970-10-01	1.91
1971-01-01	2.72
1971-04-01	2.95
1971-07-01	3.20
1971-10-01	3.83
1972-01-01	5.42
1972-04-01	7.45
1972-07-01	9.03
1972-10-01	11.04
1973-01-01	13.29
1973-04-01	15.28
1973-07-01	16.27
1973-10-01	17.04
1974-01-01	18.36
1974-04-01	19.51
1974-07-01	20.76
1974-10-01	23.79
1975-01-01	27.43
1975-04-01	31.39
1975-07-01	32.88
1975-10-01	37.99
1976-01-01	45.49
1976-04-01	50.92
1976-07-01	56.08
1976-10-01	62.82
1977-01-01	67.97
1977-04-01	74.75
1977-07-01	81.30
1977-10-01	90.43
1978-01-01	98.88
1978-04-01	105.54
1978-07-01	116.31
1978-10-01	120.90
1979-01-01	126.66
1979-04-01	133.51
1979-07-01	143.99
1979-10-01	148.06
1980-01-01	143.30
1980-04-01	158.85
1980-07-01	161.60
1980-10-01	162.65
1981-01-01	162.22
1981-04-01	161.62
1981-07-01	170.07
1981-10-01	185.29
1982-01-01	193.65
1982-04-01	201.28
1982-07-01	210.92
1982-10-01	228.02
1983-01-01	238.56
1983-04-01	246.46
1983-07-01	250.11
1983-10-01	262.29
1984-01-01	282.53
1984-04-01	287.22
1984-07-01	298.30
1984-10-01	318.22
1985-01-01	338.99
1985-04-01	360.27
1985-07-01	399.31
1985-10-01	425.86
1986-01-01	462.08
1986-04-01	512.28
1986-07-01	564.10
1986-10-01	595.60
1987-01-01	645.27
1987-04-01	670.65
1987-07-01	693.17
1987-10-01	757.37
1988-01-01	763.61
1988-04-01	768.07
1988-07-01	792.88
1988-10-01	841.55
1989-01-01	856.64
1989-04-01	880.54
1989-07-01	925.65
1989-10-01	978.00
1990-01-01	1002.49
1990-04-01	1034.08
1990-07-01	1113.70
1990-10-01	1154.30
1991-01-01	1134.44
1991-04-01	1148.94
1991-07-01	1223.43
1991-10-01	1302.15
1992-01-01	1271.04
1992-04-01	1349.39
1992-07-01	1399.06
1992-10-01	1344.06
1993-01-01	1379.32
1993-04-01	1407.05
1993-07-01	1446.69
1993-10-01	1443.79
1994-01-01	1531.47
1994-04-01	1596.15
1994-07-01	1679.32
1994-10-01	1707.57
1995-01-01	1852.31
1995-04-01	1915.33
1995-07-01	1908.49
1995-10-01	1936.69
1996-01-01	1982.93
1996-04-01	2028.56
1996-07-01	2103.50
1996-10-01	2186.46
1997-01-01	2195.00
1997-04-01	2293.51
1997-07-01	2353.60
1997-10-01	2349.82
1998-01-01	2433.50
1998-04-01	2555.47
1998-07-01	2718.42
1998-10-01	2819.94
1999-01-01	2872.31
1999-04-01	3046.14
1999-07-01	3332.34
1999-10-01	3385.31
2000-01-01	3458.07
2000-04-01	3629.76
2000-07-01	3689.51
2000-10-01	3966.95
2001-01-01	4172.41
2001-04-01	4411.86
2001-07-01	4744.25
2001-10-01	4914.12
2002-01-01	5105.27
2002-04-01	5716.78
2002-07-01	5780.68
2002-10-01	6093.30
2003-01-01	6398.23
2003-04-01	6814.91
2003-07-01	7169.03
2003-10-01	7824.96
2004-01-01	8032.42
2004-04-01	8216.64
2004-07-01	8535.55
2004-10-01	9367.02
2005-01-01	9398.75
2005-04-01	9348.88
2005-07-01	9450.38
2005-10-01	9751.41
2006-01-01	10282.95
2006-04-01	11073.06
2006-07-01	11488.42
2006-10-01	12457.49
2007-01-01	13131.77
2007-04-01	14036.66
2007-07-01	14749.95
2007-10-01	15317.96
2008-01-01	16178.06
2008-04-01	16821.85
2008-07-01	15904.36
2008-10-01	15828.10
2009-01-01	15690.65
2009-04-01	17037.28
2009-07-01	17644.60
2009-10-01	17709.56
2010-01-01	17179.10
2010-04-01	16294.45
2010-07-01	17603.25
2010-10-01	17448.44
2011-01-01	18193.33
2011-04-01	18457.79
2011-07-01	17631.30
2011-10-01	17215.06
2012-01-01	17639.82
2012-04-01	16901.91
2012-07-01	17239.53
2012-10-01	17417.58
2013-01-01	16948.19
2013-04-01	17038.66
2013-07-01	17439.93
2013-10-01	17747.31
2014-01-01	17707.34
2014-04-01	17807.05
2014-07-01	17004.36
2014-10-01	16556.86
2015-01-01	15633.57
2015-04-01	16151.97