Quarter	Billions of US Dollars
1987-01-01	5.51
1987-04-01	5.93
1987-07-01	6.28
1987-10-01	7.26
1988-01-01	9.98
1988-04-01	11.23
1988-07-01	12.65
1988-10-01	13.61
1989-01-01	14.60
1989-04-01	13.67
1989-07-01	17.38
1989-10-01	20.46
1990-01-01	22.85
1990-04-01	24.41
1990-07-01	28.88
1990-10-01	33.06
1991-01-01	33.04
1991-04-01	33.37
1991-07-01	35.61
1991-10-01	39.79
1992-01-01	40.16
1992-04-01	44.34
1992-07-01	44.79
1992-10-01	42.01
1993-01-01	38.88
1993-04-01	43.49
1993-07-01	53.28
1993-10-01	55.91
1994-01-01	64.83
1994-04-01	71.02
1994-07-01	76.56
1994-10-01	80.11
1995-01-01	91.63
1995-04-01	96.01
1995-07-01	100.47
1995-10-01	102.94
1996-01-01	107.66
1996-04-01	117.97
1996-07-01	128.78
1996-10-01	145.39
1997-01-01	145.97
1997-04-01	156.88
1997-07-01	164.30
1997-10-01	166.69
1998-01-01	174.52
1998-04-01	176.60
1998-07-01	193.04
1998-10-01	193.85
1999-01-01	201.94
1999-04-01	204.63
1999-07-01	233.30
1999-10-01	241.55
2000-01-01	262.19
2000-04-01	278.44
2000-07-01	278.49
2000-10-01	300.59
2001-01-01	297.35
2001-04-01	297.05
2001-07-01	311.86
2001-10-01	312.38
2002-01-01	306.90
2002-04-01	340.60
2002-07-01	357.50
2002-10-01	375.34
2003-01-01	400.16
2003-04-01	436.76
2003-07-01	465.04
2003-10-01	529.38
2004-01-01	573.20
2004-04-01	610.00
2004-07-01	659.35
2004-10-01	755.69
2005-01-01	777.68
2005-04-01	791.99
2005-07-01	847.04
2005-10-01	870.54
2006-01-01	935.23
2006-04-01	988.14
2006-07-01	1035.23
2006-10-01	1115.44
2007-01-01	1214.89
2007-04-01	1310.96
2007-07-01	1452.21
2007-10-01	1521.17
2008-01-01	1654.92
2008-04-01	1812.33
2008-07-01	1754.41
2008-10-01	1793.51
2009-01-01	1756.78
2009-04-01	1907.40
2009-07-01	1980.45
2009-10-01	1919.88
2010-01-01	1887.72
2010-04-01	1783.19
2010-07-01	1966.60
2010-10-01	1862.93
2011-01-01	1960.06
2011-04-01	1989.87
2011-07-01	1892.48
2011-10-01	1765.76
2012-01-01	1854.54
2012-04-01	1775.16
2012-07-01	1749.98
2012-10-01	1698.54
2013-01-01	1628.16
2013-04-01	1579.20
2013-07-01	1580.74
2013-10-01	1597.03
2014-01-01	1598.37
2014-04-01	1617.14
2014-07-01	1554.68
2014-10-01	1481.66
2015-01-01	1389.83
2015-04-01	1435.19