Month	Percent
1984-01-31	10.77
1984-02-29	10.87
1984-03-31	10.66
1984-04-30	10.85
1984-05-31	11.38
1984-06-30	11.59
1984-07-31	12.07
1984-08-31	11.41
1984-09-30	11.23
1984-10-31	11.1
1984-11-30	10.73
1984-12-31	10.87
1985-01-31	11.36
1985-02-28	11.49
1985-03-31	11.33
1985-04-30	11.07
1985-05-31	11.23
1985-06-30	11.03
1985-07-31	10.77
1985-08-31	10.69
1985-09-30	10.68
1985-10-31	10.52
1985-11-30	10.69
1985-12-31	10.78
1986-01-31	11.13
1986-02-28	10.73
1986-03-31	9.69
1986-04-30	8.94
1986-05-31	9.15
1986-06-30	9.45
1986-07-31	9.61
1986-08-31	9.66
1986-09-30	10.28
1986-10-31	10.92
1986-11-30	11.08
1986-12-31	10.98
1987-01-31	10.27
1987-02-28	9.97
1987-03-31	9.11
1987-04-30	9.14
1987-05-31	8.8
1987-06-30	8.93
1987-07-31	9.29
1987-08-31	10.13
1987-09-30	10.21
1987-10-31	10.14
1987-11-30	9.23
1987-12-31	9.63
1988-01-31	9.71
1988-02-29	9.52
1988-03-31	9.22
1988-04-30	9.2
1988-05-31	9.41
1988-06-30	9.51
1988-07-31	9.84
1988-08-31	9.91
1988-09-30	10.1
1988-10-31	9.69
1988-11-30	9.86
1988-12-31	10.14
1989-01-31	9.96
1989-02-28	9.72
1989-03-31	9.88
1989-04-30	10.18
1989-05-31	10.17
1989-06-30	10.55
1989-07-31	10.15
1989-08-31	9.91
1989-09-30	10.21
1989-10-31	10.45
1989-11-30	10.55
1989-12-31	10.56
1990-01-31	10.89
1990-02-28	11.33
1990-03-31	12.42
1990-04-30	12.74
1990-05-31	12.41
1990-06-30	11.8
1990-07-31	11.84
1990-08-31	12.15
1990-09-30	12.1
1990-10-31	11.74
1990-11-30	11.37
1990-12-31	10.84
1991-01-31	10.59
1991-02-28	10.13
1991-03-31	10.29
1991-04-30	10.19
1991-05-31	10.38
1991-06-30	10.58
1991-07-31	10.28
1991-08-31	10.03
1991-09-30	9.64
1991-10-31	9.72
1991-11-30	9.77
1991-12-31	9.66
1992-01-31	9.46
1992-02-29	9.3
1992-03-31	9.68
1992-04-30	9.43
1992-05-31	9.02
1992-06-30	9.12
1992-07-31	9.05
1992-08-31	9.35
1992-09-30	9.19
1992-10-31	8.65
1992-11-30	8.19
1992-12-31	8.32
1993-01-31	8.29
1993-02-28	7.95
1993-03-31	7.72
1993-04-30	7.89
1993-05-31	8.15
1993-06-30	7.96
1993-07-31	7.62
1993-08-31	7.07
1993-09-30	6.96
1993-10-31	6.87
1993-11-30	6.85
1993-12-31	6.28
1994-01-31	6.24
1994-02-28	6.72
1994-03-31	7.4
1994-04-30	7.86
1994-05-31	8.36
1994-06-30	8.82
1994-07-31	8.61
1994-08-31	8.74
1994-09-30	9.01
1994-10-31	8.87
1994-11-30	8.71
1994-12-31	8.65
1995-01-31	8.82
1995-02-28	8.72
1995-03-31	8.66
1995-04-30	8.49
1995-05-31	8.24
1995-06-30	8.15
1995-07-31	8.3
1995-08-31	8.15
1995-09-30	7.96
1995-10-31	8.12
1995-11-30	7.79
1995-12-31	7.5
1996-01-31	7.45
1996-02-29	7.78
1996-03-31	8.07
1996-04-30	8.07
1996-05-31	8.1
1996-06-30	8.06
1996-07-31	7.93
1996-08-31	7.85
1996-09-30	7.83
1996-10-31	7.56
1996-11-30	7.61
1996-12-31	7.56
1997-01-31	7.55
1997-02-28	7.2
1997-03-31	7.47
1997-04-30	7.65
1997-05-31	7.16
1997-06-30	7.14
1997-07-31	7.05
1997-08-31	7.09
1997-09-30	6.81
1997-10-31	6.51
1997-11-30	6.61
1997-12-31	6.36
1998-01-31	6.09
1998-02-28	6.03
1998-03-31	5.95
1998-04-30	5.79
1998-05-31	5.83
1998-06-30	5.73
1998-07-31	5.76
1998-08-31	5.54
1998-09-30	5.13
1998-10-31	5
1998-11-30	4.91
1998-12-31	4.5
1999-01-31	4.29
1999-02-28	4.45
1999-03-31	4.67
1999-04-30	4.6
1999-05-31	4.91
1999-06-30	5.17
1999-07-31	5.34
1999-08-31	5.39
1999-09-30	5.65
1999-10-31	5.84
1999-11-30	5.28
1999-12-31	5.39
2000-01-31	5.82
2000-02-29	5.63
2000-03-31	5.36
2000-04-30	5.31
2000-05-31	5.4
2000-06-30	5.2
2000-07-31	5.21
2000-08-31	5.29
2000-09-30	5.35
2000-10-31	5.19
2000-11-30	5.07
2000-12-31	4.9
2001-01-31	4.86
2001-02-28	4.85
2001-03-31	4.73
2001-04-30	4.96
2001-05-31	5.13
2001-06-30	5.2
2001-07-31	5.19
2001-08-31	4.97
2001-09-30	4.98
2001-10-31	4.83
2001-11-30	4.63
2001-12-31	4.9
2002-01-31	4.94
2002-02-28	4.97
2002-03-31	5.25
2002-04-30	5.26
2002-05-31	5.29
2002-06-30	5.12
2002-07-31	5.01
2002-08-31	4.71
2002-09-30	4.49
2002-10-31	4.61
2002-11-30	4.64
2002-12-31	4.57
2003-01-31	4.37
2003-02-28	4.25
2003-03-31	4.33
2003-04-30	4.47
2003-05-31	4.22
2003-06-30	4.11
2003-07-31	4.4
2003-08-31	4.58
2003-09-30	4.68
2003-10-31	4.89
2003-11-30	5.05
2003-12-31	4.89
2004-01-31	4.79
2004-02-29	4.81
2004-03-31	4.7
2004-04-30	4.95
2004-05-31	5.1
2004-06-30	5.19
2004-07-31	5.09
2004-08-31	4.98
2004-09-30	4.9
2004-10-31	4.77
2004-11-30	4.69
2004-12-31	4.5
2005-01-31	4.48
2005-02-28	4.61
2005-03-31	4.8
2005-04-30	4.63
2005-05-31	4.42
2005-06-30	4.28
2005-07-31	4.29
2005-08-31	4.31
2005-09-30	4.24
2005-10-31	4.37
2005-11-30	4.31
2005-12-31	4.21
2006-01-31	3.93
2006-02-28	4.05
2006-03-31	4.3
2006-04-30	4.4
2006-05-31	4.6
2006-06-30	4.65
2006-07-31	4.64
2006-08-31	4.63
2006-09-30	4.49
2006-10-31	4.61
2006-11-30	4.52
2006-12-31	4.59
2007-01-31	4.83
2007-02-28	4.9
2007-03-31	4.81
2007-04-30	4.97