Quarter	Billions of US Dollars
1987-01-01	96.18
1987-04-01	102.48
1987-07-01	107.62
1987-10-01	115.99
1988-01-01	120.97
1988-04-01	126.20
1988-07-01	130.50
1988-10-01	143.77
1989-01-01	146.33
1989-04-01	148.90
1989-07-01	156.93
1989-10-01	168.75
1990-01-01	173.40
1990-04-01	183.02
1990-07-01	200.92
1990-10-01	211.17
1991-01-01	203.64
1991-04-01	207.89
1991-07-01	223.59
1991-10-01	237.53
1992-01-01	234.79
1992-04-01	250.16
1992-07-01	259.33
1992-10-01	240.90
1993-01-01	247.16
1993-04-01	254.77
1993-07-01	322.25
1993-10-01	326.73
1994-01-01	349.55
1994-04-01	372.68
1994-07-01	391.67
1994-10-01	395.00
1995-01-01	429.22
1995-04-01	445.77
1995-07-01	461.63
1995-10-01	479.44
1996-01-01	506.56
1996-04-01	534.42
1996-07-01	560.93
1996-10-01	598.09
1997-01-01	616.67
1997-04-01	653.29
1997-07-01	676.63
1997-10-01	692.61
1998-01-01	736.63
1998-04-01	794.87
1998-07-01	857.93
1998-10-01	899.65
1999-01-01	954.01
1999-04-01	1047.06
1999-07-01	1174.68
1999-10-01	1204.58
2000-01-01	1250.77
2000-04-01	1331.15
2000-07-01	1392.82
2000-10-01	1552.05
2001-01-01	1669.06
2001-04-01	1785.37
2001-07-01	1932.72
2001-10-01	2057.72
2002-01-01	2178.80
2002-04-01	2446.46
2002-07-01	2523.24
2002-10-01	2683.72
2003-01-01	2823.59
2003-04-01	2992.88
2003-07-01	3159.79
2003-10-01	3455.09
2004-01-01	3530.03
2004-04-01	3635.47
2004-07-01	3771.36
2004-10-01	4107.00
2005-01-01	4087.94
2005-04-01	4076.82
2005-07-01	4118.03
2005-10-01	4249.67
2006-01-01	4412.18
2006-04-01	4780.39
2006-07-01	4974.25
2006-10-01	5385.70
2007-01-01	5641.37
2007-04-01	6028.89
2007-07-01	6240.33
2007-10-01	6449.58
2008-01-01	6764.91
2008-04-01	7007.90
2008-07-01	6662.09
2008-10-01	6731.97
2009-01-01	6821.68
2009-04-01	7388.00
2009-07-01	7669.67
2009-10-01	7717.74
2010-01-01	7409.63
2010-04-01	7032.18
2010-07-01	7541.50
2010-10-01	7479.11
2011-01-01	7705.13
2011-04-01	7770.21
2011-07-01	7461.29
2011-10-01	7400.90
2012-01-01	7652.86
2012-04-01	7309.20
2012-07-01	7481.67
2012-10-01	7582.24
2013-01-01	7421.62
2013-04-01	7497.42
2013-07-01	7672.05
2013-10-01	7738.89
2014-01-01	7713.48
2014-04-01	7756.93
2014-07-01	7377.00
2014-10-01	7163.53
2015-01-01	6768.80
2015-04-01	7034.78