Quarter	Billions of US Dollars
1987-01-01	139.50
1987-04-01	148.04
1987-07-01	155.77
1987-10-01	167.96
1988-01-01	174.26
1988-04-01	180.99
1988-07-01	188.22
1988-10-01	200.82
1989-01-01	211.39
1989-04-01	211.10
1989-07-01	227.17
1989-10-01	240.34
1990-01-01	251.20
1990-04-01	259.76
1990-07-01	282.79
1990-10-01	291.79
1991-01-01	287.71
1991-04-01	289.99
1991-07-01	306.28
1991-10-01	328.60
1992-01-01	321.94
1992-04-01	341.39
1992-07-01	355.72
1992-10-01	341.00
1993-01-01	335.69
1993-04-01	341.30
1993-07-01	367.59
1993-10-01	379.00
1994-01-01	407.87
1994-04-01	423.74
1994-07-01	452.01
1994-10-01	466.41
1995-01-01	510.94
1995-04-01	529.25
1995-07-01	539.28
1995-10-01	557.84
1996-01-01	581.19
1996-04-01	616.32
1996-07-01	650.97
1996-10-01	690.77
1997-01-01	706.39
1997-04-01	744.98
1997-07-01	782.38
1997-10-01	783.68
1998-01-01	818.98
1998-04-01	855.30
1998-07-01	926.11
1998-10-01	945.85
1999-01-01	984.11
1999-04-01	1029.53
1999-07-01	1150.03
1999-10-01	1178.10
2000-01-01	1224.19
2000-04-01	1304.29
2000-07-01	1312.06
2000-10-01	1409.08
2001-01-01	1456.34
2001-04-01	1498.03
2001-07-01	1588.18
2001-10-01	1599.03
2002-01-01	1643.61
2002-04-01	1852.45
2002-07-01	1867.78
2002-10-01	1974.93
2003-01-01	2127.17
2003-04-01	2291.52
2003-07-01	2414.42
2003-10-01	2718.43
2004-01-01	2888.86
2004-04-01	2969.96
2004-07-01	3174.29
2004-10-01	3564.26
2005-01-01	3669.99
2005-04-01	3702.80
2005-07-01	3808.23
2005-10-01	3926.81
2006-01-01	4256.79
2006-04-01	4580.29
2006-07-01	4752.69
2006-10-01	5176.46
2007-01-01	5583.77
2007-04-01	5988.15
2007-07-01	6378.26
2007-10-01	6683.25
2008-01-01	7240.80
2008-04-01	7656.32
2008-07-01	7172.23
2008-10-01	6924.59
2009-01-01	6635.98
2009-04-01	7131.67
2009-07-01	7408.34
2009-10-01	7323.94
2010-01-01	7182.14
2010-04-01	6711.86
2010-07-01	7350.26
2010-10-01	7199.33
2011-01-01	7620.99
2011-04-01	7738.29
2011-07-01	7314.49
2011-10-01	6998.62
2012-01-01	7238.36
2012-04-01	6861.76
2012-07-01	6913.82
2012-10-01	6860.73
2013-01-01	6592.96
2013-04-01	6553.81
2013-07-01	6672.82
2013-10-01	6778.86
2014-01-01	6739.72
2014-04-01	6744.05
2014-07-01	6413.52
2014-10-01	6171.70
2015-01-01	5802.28
2015-04-01	5932.17