Quarter	Billions of US Dollars
1987-01-01	131.60
1987-04-01	137.72
1987-07-01	142.89
1987-10-01	152.82
1988-01-01	156.37
1988-04-01	160.32
1988-07-01	164.53
1988-10-01	178.44
1989-01-01	180.65
1989-04-01	182.83
1989-07-01	192.35
1989-10-01	206.04
1990-01-01	210.69
1990-04-01	220.29
1990-07-01	241.49
1990-10-01	252.03
1991-01-01	242.67
1991-04-01	245.44
1991-07-01	263.03
1991-10-01	278.40
1992-01-01	271.90
1992-04-01	287.84
1992-07-01	298.89
1992-10-01	277.92
1993-01-01	285.43
1993-04-01	292.85
1993-07-01	362.76
1993-10-01	366.40
1994-01-01	389.25
1994-04-01	413.95
1994-07-01	432.87
1994-10-01	436.66
1995-01-01	474.36
1995-04-01	494.75
1995-07-01	511.35
1995-10-01	529.13
1996-01-01	559.45
1996-04-01	590.32
1996-07-01	619.75
1996-10-01	669.96
1997-01-01	691.52
1997-04-01	734.72
1997-07-01	765.94
1997-10-01	795.11
1998-01-01	844.98
1998-04-01	915.56
1998-07-01	991.44
1998-10-01	1040.94
1999-01-01	1094.57
1999-04-01	1195.99
1999-07-01	1346.04
1999-10-01	1379.93
2000-01-01	1428.65
2000-04-01	1518.72
2000-07-01	1582.82
2000-10-01	1754.91
2001-01-01	1872.60
2001-04-01	1998.28
2001-07-01	2164.21
2001-10-01	2290.44
2002-01-01	2410.86
2002-04-01	2702.46
2002-07-01	2781.19
2002-10-01	2947.51
2003-01-01	3083.98
2003-04-01	3253.54
2003-07-01	3424.87
2003-10-01	3731.66
2004-01-01	3805.75
2004-04-01	3908.22
2004-07-01	4037.94
2004-10-01	4385.94
2005-01-01	4356.80
2005-04-01	4334.66
2005-07-01	4378.10
2005-10-01	4535.91
2006-01-01	4739.57
2006-04-01	5152.67
2006-07-01	5405.92
2006-10-01	5918.09
2007-01-01	6257.40
2007-04-01	6730.49
2007-07-01	7002.07
2007-10-01	7224.07
2008-01-01	7544.30
2008-04-01	7777.03
2008-07-01	7419.09
2008-10-01	7494.29
2009-01-01	7580.73
2009-04-01	8144.02
2009-07-01	8418.63
2009-10-01	8452.53
2010-01-01	8139.61
2010-04-01	7757.65
2010-07-01	8275.04
2010-10-01	8204.49
2011-01-01	8428.70
2011-04-01	8483.95
2011-07-01	8176.56
2011-10-01	8111.35
2012-01-01	8351.14
2012-04-01	8009.10
2012-07-01	8182.54
2012-10-01	8277.04
2013-01-01	8097.76
2013-04-01	8172.10
2013-07-01	8348.49
2013-10-01	8420.41
2014-01-01	8395.86
2014-04-01	8454.59
2014-07-01	8090.09
2014-10-01	7879.51
2015-01-01	7488.80
2015-04-01	7754.46