Quarter	Billions of US Dollars
1987-01-01	181.71
1987-04-01	191.37
1987-07-01	199.66
1987-10-01	215.14
1988-01-01	222.08
1988-04-01	228.29
1988-07-01	237.41
1988-10-01	252.66
1989-01-01	264.44
1989-04-01	264.74
1989-07-01	282.61
1989-10-01	297.53
1990-01-01	309.75
1990-04-01	318.15
1990-07-01	348.39
1990-10-01	360.10
1991-01-01	354.98
1991-04-01	358.12
1991-07-01	377.33
1991-10-01	402.86
1992-01-01	393.27
1992-04-01	415.84
1992-07-01	435.05
1992-10-01	416.85
1993-01-01	409.95
1993-04-01	414.40
1993-07-01	456.36
1993-10-01	470.60
1994-01-01	508.35
1994-04-01	530.04
1994-07-01	566.54
1994-10-01	588.53
1995-01-01	642.39
1995-04-01	669.35
1995-07-01	684.57
1995-10-01	711.81
1996-01-01	741.64
1996-04-01	786.23
1996-07-01	828.45
1996-10-01	878.60
1997-01-01	903.49
1997-04-01	952.33
1997-07-01	1001.45
1997-10-01	1000.46
1998-01-01	1043.11
1998-04-01	1082.98
1998-07-01	1158.24
1998-10-01	1182.57
1999-01-01	1216.28
1999-04-01	1268.09
1999-07-01	1400.27
1999-10-01	1431.09
2000-01-01	1485.13
2000-04-01	1565.49
2000-07-01	1568.64
2000-10-01	1670.46
2001-01-01	1721.50
2001-04-01	1761.74
2001-07-01	1857.64
2001-10-01	1861.41
2002-01-01	1903.42
2002-04-01	2145.76
2002-07-01	2154.21
2002-10-01	2262.21
2003-01-01	2426.99
2003-04-01	2603.43
2003-07-01	2729.57
2003-10-01	3046.60
2004-01-01	3215.26
2004-04-01	3291.69
2004-07-01	3503.92
2004-10-01	3917.24
2005-01-01	4027.58
2005-04-01	4046.95
2005-07-01	4156.94
2005-10-01	4279.45
2006-01-01	4623.46
2006-04-01	4967.97
2006-07-01	5155.40
2006-10-01	5604.29
2007-01-01	6026.39
2007-04-01	6462.88
2007-07-01	6866.26
2007-10-01	7182.31
2008-01-01	7757.40
2008-04-01	8164.13
2008-07-01	7649.71
2008-10-01	7370.59
2009-01-01	7063.98
2009-04-01	7575.55
2009-07-01	7859.70
2009-10-01	7763.19
2010-01-01	7611.31
2010-04-01	7125.75
2010-07-01	7794.47
2010-10-01	7654.66
2011-01-01	8097.62
2011-04-01	8238.38
2011-07-01	7803.25
2011-10-01	7487.71
2012-01-01	7759.19
2012-04-01	7381.25
2012-07-01	7479.34
2012-10-01	7449.93
2013-01-01	7203.66
2013-04-01	7187.71
2013-07-01	7328.55
2013-10-01	7453.75
2014-01-01	7428.66
2014-04-01	7462.29
2014-07-01	7142.45
2014-10-01	6918.89
2015-01-01	6537.92
2015-04-01	6683.86