Month	Percent
1964-11-01	6.35
1964-12-01	6.35
1965-01-01	6.39
1965-02-01	6.40
1965-03-01	6.42
1965-04-01	6.44
1965-05-01	6.46
1965-06-01	6.58
1965-07-01	6.60
1965-08-01	6.52
1965-09-01	6.47
1965-10-01	6.58
1965-11-01	6.61
1965-12-01	6.66
1966-01-01	6.70
1966-02-01	6.68
1966-03-01	6.70
1966-04-01	6.76
1966-05-01	6.84
1966-06-01	6.86
1966-07-01	7.00
1966-08-01	7.04
1966-09-01	7.06
1966-10-01	7.09
1966-11-01	7.14
1966-12-01	7.08
1967-01-01	7.13
1967-02-01	7.14
1967-03-01	7.12
1967-04-01	7.12
1967-05-01	7.11
1967-06-01	7.11
1967-07-01	7.22
1967-08-01	7.19
1967-09-01	7.20
1967-10-01	7.22
1967-11-01	7.40
1967-12-01	7.64
1968-01-01	7.81
1968-02-01	7.83
1968-03-01	7.89
1968-04-01	7.90
1968-05-01	7.82
1968-06-01	7.83
1968-07-01	7.83
1968-08-01	7.76
1968-09-01	7.68
1968-10-01	7.61
1968-11-01	7.54
1968-12-01	7.45
1969-01-01	7.48
1969-02-01	7.48
1969-03-01	7.43
1969-04-01	7.41
1969-05-01	7.45
1969-06-01	7.48
1969-07-01	7.48
1969-08-01	7.65
1969-09-01	7.66
1969-10-01	7.66
1969-11-01	7.56
1969-12-01	7.50
1970-01-01	7.62
1970-02-01	7.72
1970-03-01	7.80
1970-04-01	7.84
1970-05-01	7.90
1970-06-01	7.90
1970-07-01	7.87
1970-08-01	7.81
1970-09-01	7.80
1970-10-01	7.86
1970-11-01	7.89
1970-12-01	7.77
1971-01-01	7.77
1971-02-01	7.74
1971-03-01	7.75
1971-04-01	7.77
1971-05-01	7.76
1971-06-01	7.78
1971-07-01	7.72
1971-08-01	7.65
1971-09-01	7.62
1971-10-01	7.65
1971-11-01	7.67
1971-12-01	7.63
1972-01-01	7.69
1972-02-01	7.69
1972-03-01	7.53
1972-04-01	7.37
1972-05-01	7.38
1972-06-01	7.39
1972-07-01	7.27
1972-08-01	7.10
1972-09-01	7.06
1972-10-01	7.22
1972-11-01	7.30
1972-12-01	7.59
1973-01-01	7.95
1973-02-01	7.89
1973-03-01	7.89
1973-04-01	7.85
1973-05-01	8.00
1973-06-01	8.04
1973-07-01	8.11
1973-08-01	8.27
1973-09-01	8.60
1973-10-01	8.54
1973-11-01	8.88
1973-12-01	8.98
1974-01-01	9.08
1974-02-01	9.03
1974-03-01	8.81
1974-04-01	9.32
1974-05-01	9.82
1974-06-01	10.28
1974-07-01	10.30
1974-08-01	10.22
1974-09-01	9.95
1974-10-01	9.87
1974-11-01	10.01
1974-12-01	10.18
1975-01-01	9.97
1975-02-01	9.84
1975-03-01	9.82
1975-04-01	9.76
1975-05-01	9.62
1975-06-01	9.50
1975-07-01	9.70
1975-08-01	9.52
1975-09-01	9.40
1975-10-01	9.35
1975-11-01	9.39
1975-12-01	9.41
1976-01-01	9.40
1976-02-01	9.19
1976-03-01	8.91
1976-04-01	8.77
1976-05-01	8.76
1976-06-01	8.69
1976-07-01	8.57
1976-08-01	8.52
1976-09-01	8.55
1976-10-01	8.57
1976-11-01	8.54
1976-12-01	8.55
1977-01-01	8.55
1977-02-01	8.49
1977-03-01	8.51
1977-04-01	8.51
1977-05-01	8.55
1977-06-01	8.70
1977-07-01	8.74
1977-08-01	8.79
1977-09-01	8.87
1977-10-01	8.99
1977-11-01	9.06
1977-12-01	9.00
1978-01-01	8.91
1978-02-01	8.82
1978-03-01	8.65
1978-04-01	8.50
1978-05-01	8.25
1978-06-01	7.95
1978-07-01	7.82
1978-08-01	7.90
1978-09-01	7.89
1978-10-01	7.99
1978-11-01	7.98
1978-12-01	7.91
1979-01-01	7.81
1979-02-01	7.49
1979-03-01	7.43
1979-04-01	7.59
1979-05-01	7.85
1979-06-01	8.09
1979-07-01	8.16
1979-08-01	8.19
1979-09-01	8.22
1979-10-01	8.26
1979-11-01	8.27
1979-12-01	8.20
1980-01-01	8.25
1980-02-01	8.46
1980-03-01	8.81
1980-04-01	9.37
1980-05-01	9.13
1980-06-01	8.95
1980-07-01	9.14
1980-08-01	9.48
1980-09-01	9.48
1980-10-01	9.74
1980-11-01	9.94
1980-12-01	9.60
1981-01-01	9.66
1981-02-01	9.92
1981-03-01	10.19
1981-04-01	10.18
1981-05-01	10.36
1981-06-01	10.78
1981-07-01	10.87
1981-08-01	11.19
1981-09-01	11.44
1981-10-01	11.28
1981-11-01	11.03
1981-12-01	10.37
1982-01-01	10.52
1982-02-01	10.84
1982-03-01	10.61
1982-04-01	10.30
1982-05-01	10.03
1982-06-01	10.01
1982-07-01	10.10
1982-08-01	10.04
1982-09-01	9.59
1982-10-01	9.24
1982-11-01	8.99
1982-12-01	8.81
1983-01-01	8.32
1983-02-01	8.24
1983-03-01	8.18
1983-04-01	8.09
1983-05-01	8.07
1983-06-01	8.14
1983-07-01	8.17
1983-08-01	8.31
1983-09-01	8.32
1983-10-01	8.16
1983-11-01	8.06
1983-12-01	8.02
1984-01-01	7.96
1984-02-01	7.88
1984-03-01	7.88
1984-04-01	7.94
1984-05-01	7.99
1984-06-01	8.06
1984-07-01	8.09
1984-08-01	8.10
1984-09-01	8.08
1984-10-01	8.10
1984-11-01	8.07
1984-12-01	8.04
1985-01-01	8.00
1985-02-01	8.00
1985-03-01	8.06
1985-04-01	8.08
1985-05-01	8.01
1985-06-01	7.87
1985-07-01	7.77
1985-08-01	7.58
1985-09-01	7.34
1985-10-01	7.37
1985-11-01	7.55
1985-12-01	7.61
1986-01-01	7.62
1986-02-01	7.68
1986-03-01	7.63
1986-04-01	7.38
1986-05-01	7.14
1986-06-01	7.19
1986-07-01	7.20
1986-08-01	7.12
1986-09-01	7.06
1986-10-01	7.25
1986-11-01	7.36
1986-12-01	7.33
1987-01-01	7.25
1987-02-01	7.06
1987-03-01	6.93
1987-04-01	6.86
1987-05-01	6.74
1987-06-01	6.62
1987-07-01	6.68
1987-08-01	6.83
1987-09-01	7.01
1987-10-01	7.26
1987-11-01	7.13
1987-12-01	6.89
1988-01-01	6.83
1988-02-01	6.80
1988-03-01	6.72
1988-04-01	6.62
1988-05-01	6.61
1988-06-01	6.62
1988-07-01	6.61
1988-08-01	6.76
1988-09-01	6.74
1988-10-01	6.64
1988-11-01	6.57
1988-12-01	6.53
1989-01-01	6.60
1989-02-01	6.73
1989-03-01	6.91
1989-04-01	6.96
1989-05-01	7.13
1989-06-01	7.17
1989-07-01	7.14
1989-08-01	7.14
1989-09-01	7.17
1989-10-01	7.29
1989-11-01	7.58
1989-12-01	7.85
1990-01-01	8.11
1990-02-01	8.43
1990-03-01	8.75
1990-04-01	8.79
1990-05-01	8.81
1990-06-01	8.81
1990-07-01	8.71
1990-08-01	8.80
1990-09-01	8.98
1990-10-01	9.03
1990-11-01	8.89
1990-12-01	8.80
1991-01-01	8.90
1991-02-01	8.64
1991-03-01	8.47
1991-04-01	8.45
1991-05-01	8.49
1991-06-01	8.53
1991-07-01	8.63
1991-08-01	8.69
1991-09-01	8.68
1991-10-01	8.62
1991-11-01	8.63
1991-12-01	8.65
1992-01-01	8.41
1992-02-01	8.31
1992-03-01	8.32
1992-04-01	8.38
1992-05-01	8.48
1992-06-01	8.60
1992-07-01	8.66
1992-08-01	8.65
1992-09-01	8.40
1992-10-01	7.81
1992-11-01	7.65
1992-12-01	7.56
1993-01-01	7.26
1993-02-01	7.13
1993-03-01	6.81
1993-04-01	6.82
1993-05-01	6.93
1993-06-01	6.90
1993-07-01	6.67
1993-08-01	6.51
1993-09-01	6.39
1993-10-01	6.27
1993-11-01	6.08
1993-12-01	5.91
1994-01-01	5.68
1994-02-01	5.81
1994-03-01	6.24
1994-04-01	6.40
1994-05-01	6.59
1994-06-01	6.89
1994-07-01	6.70
1994-08-01	6.88
1994-09-01	7.22
1994-10-01	7.32
1994-11-01	7.30
1994-12-01	7.27
1995-01-01	7.31
1995-02-01	7.21
1995-03-01	7.08
1995-04-01	6.77
1995-05-01	6.54
1995-06-01	6.43
1995-07-01	6.43
1995-08-01	6.29
1995-09-01	6.06
1995-10-01	6.11
1995-11-01	5.85
1995-12-01	5.56
1996-01-01	5.25
1996-02-01	5.46
1996-03-01	5.55
1996-04-01	5.42
1996-05-01	5.36
1996-06-01	5.56
1996-07-01	5.61
1996-08-01	5.40
1996-09-01	5.24
1996-10-01	4.97
1996-11-01	4.92
1996-12-01	4.81
1997-01-01	4.71
1997-02-01	4.54
1997-03-01	4.70
1997-04-01	4.77
1997-05-01	4.69
1997-06-01	4.67
1997-07-01	4.64
1997-08-01	4.83
1997-09-01	4.85
1997-10-01	5.04
1997-11-01	5.08
1997-12-01	4.91
1998-01-01	4.67
1998-02-01	4.56
1998-03-01	4.52
1998-04-01	4.61
1998-05-01	4.64
1998-06-01	4.52
1998-07-01	4.43
1998-08-01	4.24
1998-09-01	3.96
1998-10-01	3.87
1998-11-01	3.88
1998-12-01	3.61
1999-01-01	3.40
1999-02-01	3.53
1999-03-01	3.65
1999-04-01	3.42
1999-05-01	3.49
1999-06-01	3.86
1999-07-01	4.21
1999-08-01	4.47
1999-09-01	4.60
1999-10-01	4.92
1999-11-01	4.74
1999-12-01	4.84
2000-01-01	5.16
2000-02-01	5.25
2000-03-01	5.17
2000-04-01	5.13
2000-05-01	5.45
2000-06-01	5.36
2000-07-01	5.48
2000-08-01	5.49
2000-09-01	5.47
2000-10-01	5.40
2000-11-01	5.35
2000-12-01	5.03
2001-01-01	4.82
2001-02-01	4.83
2001-03-01	4.73
2001-04-01	4.80
2001-05-01	4.95
2001-06-01	4.85
2001-07-01	4.84
2001-08-01	4.62
2001-09-01	4.46
2001-10-01	4.21
2001-11-01	4.05
2001-12-01	4.32
2002-01-01	4.46
2002-02-01	4.59
2002-03-01	4.83
2002-04-01	4.85
2002-05-01	4.87
2002-06-01	4.67
2002-07-01	4.57
2002-08-01	4.27
2002-09-01	4.03
2002-10-01	3.97
2002-11-01	3.93
2002-12-01	3.74
2003-01-01	3.52
2003-02-01	3.31
2003-03-01	3.34
2003-04-01	3.45
2003-05-01	3.15
2003-06-01	2.90
2003-07-01	3.18
2003-08-01	3.46
2003-09-01	3.58
2003-10-01	3.57
2003-11-01	3.73
2003-12-01	3.69
2004-01-01	3.49
2004-02-01	3.44
2004-03-01	3.20
2004-04-01	3.37
2004-05-01	3.56
2004-06-01	3.65
2004-07-01	3.61
2004-08-01	3.43
2004-09-01	3.44
2004-10-01	3.33
2004-11-01	3.25
2004-12-01	3.10
2005-01-01	3.09
2005-02-01	3.09
2005-03-01	3.22
2005-04-01	3.05
2005-05-01	2.90
2005-06-01	2.73
2005-07-01	2.80
2005-08-01	2.85
2005-09-01	2.74
2005-10-01	2.93
2005-11-01	3.16
2005-12-01	3.12
2006-01-01	3.12
2006-02-01	3.28
2006-03-01	3.47
2006-04-01	3.70
2006-05-01	3.77
2006-06-01	3.77
2006-07-01	3.86
2006-08-01	3.76
2006-09-01	3.70
2006-10-01	3.74
2006-11-01	3.71
2006-12-01	3.77
2007-01-01	4.00
2007-02-01	4.04
2007-03-01	3.95
2007-04-01	4.16
2007-05-01	4.30
2007-06-01	4.58
2007-07-01	4.56
2007-08-01	4.34
2007-09-01	4.26
2007-10-01	4.32
2007-11-01	4.10
2007-12-01	4.21
2008-01-01	3.99
2008-02-01	3.83
2008-03-01	3.81
2008-04-01	4.12
2008-05-01	4.30
2008-06-01	4.72
2008-07-01	4.71
2008-08-01	4.37
2008-09-01	4.27
2008-10-01	3.94
2008-11-01	3.72
2008-12-01	3.41
2009-01-01	3.47
2009-02-01	3.55
2009-03-01	3.59
2009-04-01	3.46
2009-05-01	3.41
2009-06-01	3.57
2009-07-01	3.33
2009-08-01	3.11
2009-09-01	3.05
2009-10-01	3.01
2009-11-01	2.91
2009-12-01	2.90
2010-01-01	3.04
2010-02-01	2.90
2010-03-01	2.75
2010-04-01	2.68
2010-05-01	2.40
2010-06-01	2.40
2010-07-01	2.33
2010-08-01	2.10
2010-09-01	2.08
2010-10-01	2.16
2010-11-01	2.28
2010-12-01	2.57
2011-01-01	2.59
2011-02-01	2.84
2011-03-01	2.96
2011-04-01	3.09
2011-05-01	2.99
2011-06-01	2.77
2011-07-01	2.80
2011-08-01	2.26
2011-09-01	2.04
2011-10-01	2.12
2011-11-01	2.62
2011-12-01	2.51
2012-01-01	2.35
2012-02-01	2.12
2012-03-01	1.94
2012-04-01	1.88
2012-05-01	1.68
2012-06-01	1.48
2012-07-01	1.22
2012-08-01	1.02
2012-09-01	1.07
2012-10-01	1.04
2012-11-01	1.04
2012-12-01	0.97
2013-01-01	0.98
2013-02-01	1.01
2013-03-01	0.96
2013-04-01	0.88
2013-05-01	0.82
2013-06-01	0.83
2013-07-01	1.07
2013-08-01	1.12
2013-09-01	1.21
2013-10-01	1.27
2013-11-01	1.25
2013-12-01	1.24
2014-01-01	1.27
2014-02-01	1.20
2014-03-01	1.18
2014-04-01	1.16
2014-05-01	1.10
2014-06-01	0.97
2014-07-01	0.95
2014-08-01	0.86
2014-09-01	0.77
2014-10-01	0.73
2014-11-01	0.66
2014-12-01	0.60
2015-01-01	0.51
2015-02-01	0.45
2015-03-01	0.42