Quarter	Billions of US Dollars
1987-01-01	3.69
1987-04-01	4.08
1987-07-01	5.00
1987-10-01	5.73
1988-01-01	5.60
1988-04-01	5.85
1988-07-01	6.30
1988-10-01	6.90
1989-01-01	7.57
1989-04-01	7.62
1989-07-01	8.24
1989-10-01	9.25
1990-01-01	9.75
1990-04-01	9.75
1990-07-01	11.40
1990-10-01	11.97
1991-01-01	11.40
1991-04-01	11.02
1991-07-01	11.87
1991-10-01	12.95
1992-01-01	13.40
1992-04-01	14.48
1992-07-01	15.86
1992-10-01	15.13
1993-01-01	14.89
1993-04-01	14.64
1993-07-01	18.87
1993-10-01	21.65
1994-01-01	22.67
1994-04-01	25.14
1994-07-01	26.37
1994-10-01	26.53
1995-01-01	28.19
1995-04-01	31.96
1995-07-01	32.98
1995-10-01	34.43
1996-01-01	39.81
1996-04-01	46.63
1996-07-01	50.48
1996-10-01	66.19
1997-01-01	69.63
1997-04-01	79.77
1997-07-01	94.43
1997-10-01	110.39
1998-01-01	115.19
1998-04-01	128.75
1998-07-01	142.11
1998-10-01	151.90
1999-01-01	157.67
1999-04-01	168.76
1999-07-01	185.12
1999-10-01	193.45
2000-01-01	199.09
2000-04-01	207.95
2000-07-01	217.65
2000-10-01	228.30
2001-01-01	234.97
2001-04-01	247.72
2001-07-01	267.72
2001-10-01	274.91
2002-01-01	279.64
2002-04-01	302.90
2002-07-01	309.62
2002-10-01	319.27
2003-01-01	318.18
2003-04-01	322.79
2003-07-01	333.27
2003-10-01	346.81
2004-01-01	353.80
2004-04-01	355.47
2004-07-01	361.31
2004-10-01	385.79
2005-01-01	382.57
2005-04-01	379.59
2005-07-01	390.85
2005-10-01	423.89
2006-01-01	475.18
2006-04-01	533.53
2006-07-01	603.82
2006-10-01	731.58
2007-01-01	835.71
2007-04-01	938.69
2007-07-01	1003.21
2007-10-01	1029.91
2008-01-01	1045.02
2008-04-01	1045.10
2008-07-01	1030.48
2008-10-01	1024.29
2009-01-01	999.70
2009-04-01	1018.88
2009-07-01	1035.62
2009-10-01	1034.12
2010-01-01	1027.07
2010-04-01	1014.78
2010-07-01	1038.94
2010-10-01	1047.79
2011-01-01	1054.59
2011-04-01	1050.07
2011-07-01	1043.73
2011-10-01	1047.19
2012-01-01	1058.37
2012-04-01	1061.49
2012-07-01	1075.94
2012-10-01	1092.49
2013-01-01	1090.69
2013-04-01	1110.06
2013-07-01	1118.09
2013-10-01	1135.61
2014-01-01	1149.80
2014-04-01	1185.12
2014-07-01	1190.48
2014-10-01	1203.09
2015-01-01	1207.20
2015-04-01	1222.31