Month	Percent
1975-01-31	11.61
1975-02-28	11.67
1975-03-31	10.64
1975-04-30	9.52
1975-05-31	9.84
1975-06-30	9.52
1975-07-31	9.79
1975-08-31	10.39
1975-09-30	10.33
1975-10-31	11.29
1975-11-30	11.25
1975-12-31	10.91
1976-01-31	10.33
1976-02-29	9.03
1976-03-31	8.39
1976-04-30	8.82
1976-05-31	10.26
1976-06-30	11.03
1976-07-31	11.11
1976-08-31	10.88
1976-09-30	11.88
1976-10-31	14.4
1976-11-30	14.91
1976-12-31	14.76
1977-01-31	14.04
1977-02-28	11.93
1977-03-31	10.54
1977-04-30	8.6
1977-05-31	7.6
1977-06-30	7.39
1977-07-31	7.33
1977-08-31	7.01
1977-09-30	6.04
1977-10-31	5.07
1977-11-30	4.89
1977-12-31	6.59
1978-01-31	6.31
1978-02-28	6.14
1978-03-31	6.24
1978-04-30	6.85
1978-05-31	8.49
1978-06-30	9.73
1978-07-31	9.96
1978-08-31	9.41
1978-09-30	9.11
1978-10-31	9.71
1978-11-30	11.78
1978-12-31	12.01
1979-01-31	12.03
1979-02-28	13.15
1979-03-31	12.69
1979-04-30	11.86
1979-05-31	12
1979-06-30	13.12
1979-07-31	14.1
1979-08-31	14.19
1979-09-30	14.22
1979-10-31	14.13
1979-11-30	16.16
1979-12-31	16.7
1980-01-31	17.26
1980-02-29	17.89
1980-03-31	17.96
1980-04-30	17.57
1980-05-31	17.4
1980-06-30	17.19
1980-07-31	16.54
1980-08-31	16.47
1980-09-30	16.29
1980-10-31	15.86
1980-11-30	15.83
1980-12-31	14.18
1981-01-31	13.96
1981-02-28	13.45
1981-03-31	12.26
1981-04-30	11.82
1981-05-31	11.69
1981-06-30	11.73
1981-07-31	13.04
1981-08-31	13.04
1981-09-30	13.98
1981-10-31	15.81
1981-11-30	14.83
1981-12-31	14.61
1982-01-31	14.34
1982-02-28	13.84
1982-03-31	13.18
1982-04-30	13.09
1982-05-31	13.01
1982-06-30	12.64
1982-07-31	12.05
1982-08-31	11.02
1982-09-30	10.48
1982-10-31	9.7
1982-11-30	9.21
1982-12-31	10.19
1983-01-31	10.84
1983-02-28	11.04
1983-03-31	10.74
1983-04-30	10.16
1983-05-31	10.07
1983-06-30	9.69
1983-07-31	9.5
1983-08-31	9.42
1983-09-30	9.49
1983-10-31	9.04
1983-11-30	9.02
1983-12-31	8.98
1984-01-31	9
1984-02-29	9.01
1984-03-31	8.62
1984-04-30	8.51
1984-05-31	8.79
1984-06-30	8.91
1984-07-31	11.13
1984-08-31	10.84
1984-09-30	10.41
1984-10-31	10.38
1984-11-30	9.67
1984-12-31	9.37
1985-01-31	11.31
1985-02-28	13.65
1985-03-31	13.44
1985-04-30	12.51
1985-05-31	12.29
1985-06-30	12.33
1985-07-31	11.86
1985-08-31	11.4
1985-09-30	11.33
1985-10-31	11.34
1985-11-30	11.32
1985-12-31	11.32
1986-01-31	12.3
1986-02-28	12.35
1986-03-31	11.84
1986-04-30	10.68
1986-05-31	10.15
1986-06-30	9.77
1986-07-31	9.81
1986-08-31	9.79
1986-09-30	9.84
1986-10-31	10.5
1986-11-30	10.75
1986-12-31	10.79
1987-01-31	10.81
1987-02-28	10.79
1987-03-31	10.06
1987-04-30	9.71
1987-05-31	8.72
1987-06-30	8.78
1987-07-31	8.82
1987-08-31	9.48
1987-09-30	9.7
1987-10-31	9.59
1987-11-30	8.83
1987-12-31	8.4
1988-01-31	8.33
1988-02-29	8.63
1988-03-31	8.46
1988-04-30	7.92
1988-05-31	7.53
1988-06-30	8.26
1988-07-31	9.88
1988-08-31	10.67
1988-09-30	11.43
1988-10-31	11.68
1988-11-30	11.83
1988-12-31	12.64
1989-01-31	12.72
1989-02-28	12.68
1989-03-31	12.64
1989-04-30	12.5
1989-05-31	12.67
1989-06-30	13.59
1989-07-31	13.63
1989-08-31	13.63
1989-09-30	13.76
1989-10-31	14.65
1989-11-30	14.77
1989-12-31	14.6
1990-01-31	14.74
1990-02-28	14.73
1990-03-31	14.74
1990-04-30	14.69
1990-05-31	14.69
1990-06-30	14.61
1990-07-31	14.62
1990-08-31	14.63
1990-09-30	14.64
1990-10-31	13.87
1990-11-30	13.74
1990-12-31	13.7
1991-01-31	13.71
1991-02-28	13.24
1991-03-31	12.38
1991-04-30	11.72
1991-05-31	11.48
1991-06-30	11.12
1991-07-31	10.89
1991-08-31	10.66
1991-09-30	10.22
1991-10-31	10.25
1991-11-30	10.24
1991-12-31	10.3
1992-01-31	10.22
1992-02-29	10.18
1992-03-31	10.19
1992-04-30	10.26
1992-05-31	9.69
1992-06-30	9.61
1992-07-31	9.69
1992-08-31	9.76
1992-09-30	9.54
1992-10-31	8.16
1992-11-30	7.01
1992-12-31	6.71
1993-01-31	6.57
1993-02-28	5.7
1993-03-31	5.72
1993-04-30	5.7
1993-05-31	5.67
1993-06-30	5.64
1993-07-31	5.68
1993-08-31	5.67
1993-09-30	5.61
1993-10-31	5.61
1993-11-30	5.45
1993-12-31	5.16
1994-01-31	5.16
1994-02-28	4.98
1994-03-31	4.9
1994-04-30	4.89
1994-05-31	4.86
1994-06-30	4.85
1994-07-31	4.94
1994-08-31	4.96
1994-09-30	5.14
1994-10-31	5.35
1994-11-30	5.51
1994-12-31	5.8
1995-01-31	6.01
1995-02-28	6.41
1995-03-31	6.14
1995-04-30	6.1
1995-05-31	6.2
1995-06-30	6.3
1995-07-31	6.53
1995-08-31	6.58
1995-09-30	6.6
1995-10-31	6.62
1995-11-30	6.61
1995-12-31	6.46
1996-01-31	6.26
1996-02-29	6.11
1996-03-31	5.94
1996-04-30	5.9
1996-05-31	5.9
1996-06-30	5.7
1996-07-31	5.65
1996-08-31	5.65
1996-09-30	5.66
1996-10-31	5.72
1996-11-30	5.92
1996-12-31	5.95
1997-01-31	5.98
1997-02-28	5.91
1997-03-31	5.93
1997-04-30	6.03
1997-05-31	6.21
1997-06-30	6.39
1997-07-31	6.67
1997-08-31	6.91
1997-09-30	6.95
1997-10-31	7
1997-11-30	7.18
1997-12-31	7.21
1998-01-31	7.25
1998-02-28	7.24
1998-03-31	7.25
1998-04-30	7.23
1998-05-31	7.2
1998-06-30	7.36
1998-07-31	7.41
1998-08-31	7.44
1998-09-30	7.29
1998-10-31	7.12
1998-11-30	6.66
1998-12-31	6.15
1999-01-31	5.8
1999-02-28	5.43
1999-03-31	5.23
1999-04-30	5.12
1999-05-31	5.17
1999-06-30	4.95
1999-07-31	4.88
1999-08-31	4.9
1999-09-30	5.07
1999-10-31	5.27
1999-11-30	5.34
1999-12-31	5.41
2000-01-31	5.69
2000-02-29	5.95
2000-03-31	5.89
2000-04-30	5.93
2000-05-31	5.98
2000-06-30	5.93
2000-07-31	5.91
2000-08-31	5.9
2000-09-30	5.9
2000-10-31	5.89
2000-11-30	5.86
2000-12-31	5.78
2001-01-31	5.78
2001-02-28	5.66
2001-03-31	5.5
2001-04-30	5.34
2001-05-31	5.15
2001-06-30	5.09
2001-07-31	5.09
2001-08-31	4.86
2001-09-30	4.67
2001-10-31	4.39
2001-11-30	3.89
2001-12-31	3.94
2002-01-31	3.92
2002-02-28	3.92
2002-03-31	3.98
2002-04-30	3.94
2002-05-31	3.91
2002-06-30	3.89
2002-07-31	3.84
2002-08-31	3.87
2002-09-30	3.88
2002-10-31	3.87
2002-11-30	3.86
2002-12-31	3.73
2003-01-31	3.89
2003-02-28	3.69
2003-03-31	3.61
2003-04-30	3.6
2003-05-31	3.59
2003-06-30	3.59
2003-07-31	3.35
2003-08-31	3.39
2003-09-30	3.58
2003-10-31	3.59
2003-11-30	3.74
2003-12-31	3.79
2004-01-31	3.83
2004-02-29	4.01
2004-03-31	4.07
2004-04-30	4.12
2004-05-31	4.33
2004-06-30	4.48
2004-07-31	4.56
2004-08-31	4.75
2004-09-30	4.76
2004-10-31	4.75
2004-11-30	4.75
2004-12-31	4.74
2005-01-31	4.71
2005-02-28	4.75
2005-03-31	4.78
2005-04-30	4.79
2005-05-31	4.79
2005-06-30	4.77
2005-07-31	4.67
2005-08-31	4.53