Month	Percent
1960-01-01	4.37
1960-02-01	4.22
1960-03-01	4.08
1960-04-01	4.17
1960-05-01	4.16
1960-06-01	3.99
1960-07-01	3.86
1960-08-01	3.79
1960-09-01	3.82
1960-10-01	3.91
1960-11-01	3.93
1960-12-01	3.88
1961-01-01	3.89
1961-02-01	3.81
1961-03-01	3.78
1961-04-01	3.80
1961-05-01	3.73
1961-06-01	3.88
1961-07-01	3.90
1961-08-01	4.00
1961-09-01	4.02
1961-10-01	3.98
1961-11-01	3.98
1961-12-01	4.06
1962-01-01	4.08
1962-02-01	4.09
1962-03-01	4.01
1962-04-01	3.89
1962-05-01	3.88
1962-06-01	3.90
1962-07-01	4.02
1962-08-01	3.97
1962-09-01	3.94
1962-10-01	3.89
1962-11-01	3.87
1962-12-01	3.87
1963-01-01	3.88
1963-02-01	3.92
1963-03-01	3.93
1963-04-01	3.97
1963-05-01	3.97
1963-06-01	4.00
1963-07-01	4.01
1963-08-01	3.99
1963-09-01	4.04
1963-10-01	4.07
1963-11-01	4.10
1963-12-01	4.14
1964-01-01	4.15
1964-02-01	4.14
1964-03-01	4.18
1964-04-01	4.20
1964-05-01	4.16
1964-06-01	4.13
1964-07-01	4.13
1964-08-01	4.14
1964-09-01	4.16
1964-10-01	4.16
1964-11-01	4.12
1964-12-01	4.14
1965-01-01	4.14
1965-02-01	4.16
1965-03-01	4.15
1965-04-01	4.15
1965-05-01	4.14
1965-06-01	4.14
1965-07-01	4.15
1965-08-01	4.19
1965-09-01	4.25
1965-10-01	4.27
1965-11-01	4.34
1965-12-01	4.43
1966-01-01	4.43
1966-02-01	4.61
1966-03-01	4.63
1966-04-01	4.55
1966-05-01	4.57
1966-06-01	4.63
1966-07-01	4.74
1966-08-01	4.80
1966-09-01	4.79
1966-10-01	4.70
1966-11-01	4.74
1966-12-01	4.65
1967-01-01	4.40
1967-02-01	4.47
1967-03-01	4.45
1967-04-01	4.51
1967-05-01	4.76
1967-06-01	4.86
1967-07-01	4.86
1967-08-01	4.95
1967-09-01	4.99
1967-10-01	5.18
1967-11-01	5.44
1967-12-01	5.36
1968-01-01	5.18
1968-02-01	5.16
1968-03-01	5.39
1968-04-01	5.28
1968-05-01	5.40
1968-06-01	5.23
1968-07-01	5.09
1968-08-01	5.04
1968-09-01	5.09
1968-10-01	5.24
1968-11-01	5.36
1968-12-01	5.66
1969-01-01	5.74
1969-02-01	5.86
1969-03-01	6.05
1969-04-01	5.84
1969-05-01	5.85
1969-06-01	6.05
1969-07-01	6.07
1969-08-01	6.02
1969-09-01	6.32
1969-10-01	6.27
1969-11-01	6.52
1969-12-01	6.81
1970-01-01	6.86
1970-02-01	6.44
1970-03-01	6.39
1970-04-01	6.53
1970-05-01	6.94
1970-06-01	6.99
1970-07-01	6.57
1970-08-01	6.75
1970-09-01	6.63
1970-10-01	6.59
1970-11-01	6.24
1970-12-01	5.97
1971-01-01	5.92
1971-02-01	5.84
1971-03-01	5.71
1971-04-01	5.75
1971-05-01	5.96
1971-06-01	5.94
1971-07-01	5.91
1971-08-01	5.78
1971-09-01	5.56
1971-10-01	5.46
1971-11-01	5.48
1971-12-01	5.62
1972-01-01	5.62
1972-02-01	5.67
1972-03-01	5.66
1972-04-01	5.74
1972-05-01	5.64
1972-06-01	5.59
1972-07-01	5.59
1972-08-01	5.59
1972-09-01	5.70
1972-10-01	5.69
1972-11-01	5.51
1972-12-01	5.63
1973-01-01	5.96
1973-02-01	6.14
1973-03-01	6.20
1973-04-01	6.11
1973-05-01	6.25
1973-06-01	6.32
1973-07-01	6.53
1973-08-01	6.85
1973-09-01	6.41
1973-10-01	6.25
1973-11-01	6.30
1973-12-01	6.35
1974-01-01	6.56
1974-02-01	6.54
1974-03-01	6.81
1974-04-01	7.04
1974-05-01	7.09
1974-06-01	7.02
1974-07-01	7.18
1974-08-01	7.33
1974-09-01	7.30
1974-10-01	7.22
1974-11-01	6.93
1974-12-01	6.77
1975-01-01	6.68
1975-02-01	6.66
1975-03-01	6.77
1975-04-01	7.05
1975-05-01	7.01
1975-06-01	6.86
1975-07-01	6.89
1975-08-01	7.11
1975-09-01	7.28
1975-10-01	7.29
1975-11-01	7.21
1975-12-01	7.17
1976-01-01	6.93
1976-02-01	6.92
1976-03-01	6.88
1976-04-01	6.73
1976-05-01	7.01
1976-06-01	6.92
1976-07-01	6.85
1976-08-01	6.82
1976-09-01	6.70
1976-10-01	6.65
1976-11-01	6.62
1976-12-01	6.38
1977-01-01	6.68
1977-02-01	7.16
1977-03-01	7.20
1977-04-01	7.13
1977-05-01	7.17
1977-06-01	6.99
1977-07-01	6.98
1977-08-01	7.01
1977-09-01	6.94
1977-10-01	7.08
1977-11-01	7.16
1977-12-01	7.24
1978-01-01	7.51
1978-02-01	7.60
1978-03-01	7.63
1978-04-01	7.74
1978-05-01	7.87
1978-06-01	7.94
1978-07-01	8.10
1978-08-01	7.88
1978-09-01	7.82
1978-10-01	8.07
1978-11-01	8.16
1978-12-01	8.36
1979-01-01	8.43
1979-02-01	8.43
1979-03-01	8.45
1979-04-01	8.44
1979-05-01	8.55
1979-06-01	8.32
1979-07-01	8.35
1979-08-01	8.42
1979-09-01	8.68
1979-10-01	9.44
1979-11-01	9.80
1979-12-01	9.58
1980-01-01	10.03
1980-02-01	11.55
1980-03-01	11.87
1980-04-01	10.83
1980-05-01	9.82
1980-06-01	9.40
1980-07-01	9.83
1980-08-01	10.53
1980-09-01	10.94
1980-10-01	11.20
1980-11-01	11.83
1980-12-01	11.89
1981-01-01	11.65
1981-02-01	12.23
1981-03-01	12.15
1981-04-01	12.62
1981-05-01	12.96
1981-06-01	12.39
1981-07-01	13.37
1981-08-01	14.24
1981-09-01	14.68
1981-10-01	13.77
1981-11-01	12.23
1981-12-01	13.21
1982-01-01	13.38
1982-02-01	13.29
1982-03-01	13.13
1982-04-01	12.81
1982-05-01	12.81
1982-06-01	13.33
1982-07-01	12.78
1982-08-01	11.88
1982-09-01	11.18
1982-10-01	10.29
1982-11-01	10.48
1982-12-01	10.25
1983-01-01	10.72
1983-02-01	10.21
1983-03-01	10.40
1983-04-01	10.07
1983-05-01	10.63
1983-06-01	10.72
1983-07-01	11.47
1983-08-01	11.56
1983-09-01	11.08
1983-10-01	11.37
1983-11-01	11.22
1983-12-01	11.43
1984-01-01	11.28
1984-02-01	11.65
1984-03-01	12.05
1984-04-01	12.36
1984-05-01	13.29
1984-06-01	13.24
1984-07-01	12.43
1984-08-01	12.26
1984-09-01	11.94
1984-10-01	11.33
1984-11-01	11.28
1984-12-01	11.25
1985-01-01	10.92
1985-02-01	11.84
1985-03-01	11.61
1985-04-01	11.43
1985-05-01	10.49
1985-06-01	10.44
1985-07-01	10.75
1985-08-01	10.52
1985-09-01	10.62
1985-10-01	10.31
1985-11-01	9.89
1985-12-01	9.35
1986-01-01	9.44
1986-02-01	8.36
1986-03-01	7.58
1986-04-01	7.70
1986-05-01	8.38
1986-06-01	7.81
1986-07-01	7.95
1986-08-01	7.53
1986-09-01	8.06
1986-10-01	7.87
1986-11-01	7.71
1986-12-01	7.78
1987-01-01	7.68
1987-02-01	7.58
1987-03-01	7.85
1987-04-01	8.47
1987-05-01	8.67
1987-06-01	8.64
1987-07-01	8.92
1987-08-01	8.84
1987-09-01	8.81
1987-10-01	8.73
1987-11-01	8.74
1987-12-01	8.76
1988-01-01	8.41
1988-02-01	8.37
1988-03-01	8.79
1988-04-01	9.06
1988-05-01	9.32
1988-06-01	8.96
1988-07-01	9.25
1988-08-01	9.30
1988-09-01	9.08
1988-10-01	8.72
1988-11-01	9.18
1988-12-01	9.14
1989-01-01	8.97
1989-02-01	9.31
1989-03-01	9.26
1989-04-01	9.07
1989-05-01	8.72
1989-06-01	8.19
1989-07-01	7.99
1989-08-01	8.36
1989-09-01	8.41
1989-10-01	8.05
1989-11-01	8.02
1989-12-01	8.11
1990-01-01	8.62
1990-02-01	8.70
1990-03-01	8.81
1990-04-01	9.17
1990-05-01	8.75
1990-06-01	8.57
1990-07-01	8.53
1990-08-01	9.09
1990-09-01	9.02
1990-10-01	8.85
1990-11-01	8.46
1990-12-01	8.33
1991-01-01	8.27
1991-02-01	8.29
1991-03-01	8.32
1991-04-01	8.26
1991-05-01	8.33
1991-06-01	8.49
1991-07-01	8.40
1991-08-01	8.09
1991-09-01	7.81
1991-10-01	7.83
1991-11-01	7.83
1991-12-01	7.27
1992-01-01	7.70
1992-02-01	7.72
1992-03-01	7.92
1992-04-01	7.98
1992-05-01	7.76
1992-06-01	7.64
1992-07-01	7.25
1992-08-01	7.23
1992-09-01	7.09
1992-10-01	7.40
1992-11-01	7.46
1992-12-01	7.25
1993-01-01	6.99
1993-02-01	6.71
1993-03-01	6.74
1993-04-01	6.71
1993-05-01	6.76
1993-06-01	6.38
1993-07-01	6.31
1993-08-01	6.00
1993-09-01	6.00
1993-10-01	5.98
1993-11-01	6.32
1993-12-01	6.34
1994-01-01	6.14
1994-02-01	6.64
1994-03-01	7.15
1994-04-01	7.37
1994-05-01	7.50
1994-06-01	7.68
1994-07-01	7.40
1994-08-01	7.53
1994-09-01	7.93
1994-10-01	8.05
1994-11-01	8.07
1994-12-01	7.98
1995-01-01	7.78
1995-02-01	7.52
1995-03-01	7.51
1995-04-01	7.39
1995-05-01	6.71
1995-06-01	6.64
1995-07-01	6.86
1995-08-01	6.71
1995-09-01	6.59
1995-10-01	6.38
1995-11-01	6.19
1995-12-01	5.99
1996-01-01	6.03
1996-02-01	6.56
1996-03-01	6.81
1996-04-01	7.03
1996-05-01	7.15
1996-06-01	7.01
1996-07-01	7.06
1996-08-01	7.24
1996-09-01	7.02
1996-10-01	6.71
1996-11-01	6.44
1996-12-01	6.72
1997-01-01	6.85
1997-02-01	6.90
1997-03-01	7.21
1997-04-01	7.03
1997-05-01	6.97
1997-06-01	6.84
1997-07-01	6.34
1997-08-01	6.67
1997-09-01	6.45
1997-10-01	6.19
1997-11-01	6.12
1997-12-01	6.01
1998-01-01	5.87
1998-02-01	5.97
1998-03-01	6.00
1998-04-01	6.01
1998-05-01	5.88
1998-06-01	5.71
1998-07-01	5.79
1998-08-01	5.42
1998-09-01	5.13
1998-10-01	5.32
1998-11-01	5.27
1998-12-01	5.33
1999-01-01	5.29
1999-02-01	5.80
1999-03-01	5.87
1999-04-01	5.89
1999-05-01	6.10
1999-06-01	6.24
1999-07-01	6.34
1999-08-01	6.42
1999-09-01	6.40
1999-10-01	6.46
1999-11-01	6.57
1999-12-01	6.76
2000-01-01	6.67
2000-02-01	6.41
2000-03-01	6.14
2000-04-01	6.27
2000-05-01	6.36
2000-06-01	6.20
2000-07-01	6.08
2000-08-01	5.92
2000-09-01	6.09
2000-10-01	5.98
2000-11-01	5.75
2000-12-01	5.51
2001-01-01	5.62
2001-02-01	5.48
2001-03-01	5.57
2001-04-01	5.88
2001-05-01	5.91
2001-06-01	5.88
2001-07-01	5.58
2001-08-01	5.44
2001-09-01	5.41
2001-10-01	5.00
2001-11-01	5.49
2001-12-01	5.71
2002-01-01	5.63
2002-02-01	5.57
2002-03-01	6.00
2002-04-01	5.69
2002-05-01	5.71
2002-06-01	5.58
2002-07-01	5.32
2002-08-01	4.97
2002-09-01	4.63
2002-10-01	4.93
2002-11-01	5.07
2002-12-01	4.73
2003-01-01	4.81
2003-02-01	4.57
2003-03-01	4.71
2003-04-01	4.66
2003-05-01	4.19
2003-06-01	4.35
2003-07-01	5.27
2003-08-01	5.17
2003-09-01	4.73
2003-10-01	5.03
2003-11-01	5.03
2003-12-01	4.94
2004-01-01	4.83
2004-02-01	4.68
2004-03-01	4.57
2004-04-01	5.16
2004-05-01	5.25
2004-06-01	5.20
2004-07-01	5.09
2004-08-01	4.77
2004-09-01	4.73
2004-10-01	4.63
2004-11-01	4.89
2004-12-01	4.71
2005-01-01	4.52
2005-02-01	4.69
2005-03-01	4.80
2005-04-01	4.51
2005-05-01	4.31
2005-06-01	4.20
2005-07-01	4.49
2005-08-01	4.26
2005-09-01	4.57
2005-10-01	4.79
2005-11-01	4.76
2005-12-01	4.70
2006-01-01	4.61
2006-02-01	4.72
2006-03-01	4.89
2006-04-01	5.19
2006-05-01	5.31
2006-06-01	5.27
2006-07-01	5.23
2006-08-01	5.05
2006-09-01	4.90
2006-10-01	4.90
2006-11-01	4.75
2006-12-01	4.74
2007-01-01	4.92
2007-02-01	4.90
2007-03-01	4.77
2007-04-01	4.90
2007-05-01	4.94
2007-06-01	5.26
2007-07-01	5.17
2007-08-01	4.96
2007-09-01	4.80
2007-10-01	4.79
2007-11-01	4.49
2007-12-01	4.50
2008-01-01	4.23
2008-02-01	4.34
2008-03-01	4.19
2008-04-01	4.29
2008-05-01	4.46
2008-06-01	4.63
2008-07-01	4.52
2008-08-01	4.41
2008-09-01	4.20
2008-10-01	4.40
2008-11-01	4.20
2008-12-01	3.11
2009-01-01	3.34
2009-02-01	3.69
2009-03-01	3.63
2009-04-01	3.68
2009-05-01	4.07
2009-06-01	4.40
2009-07-01	4.24
2009-08-01	4.21
2009-09-01	4.02
2009-10-01	4.01
2009-11-01	4.06
2009-12-01	4.22
2010-01-01	4.32
2010-02-01	4.31
2010-03-01	4.33
2010-04-01	4.39
2010-05-01	3.99
2010-06-01	3.83
2010-07-01	3.65
2010-08-01	3.38
2010-09-01	3.35
2010-10-01	3.36
2010-11-01	3.64
2010-12-01	4.02
2011-01-01	4.12
2011-02-01	4.27
2011-03-01	4.14
2011-04-01	4.15
2011-05-01	3.90
2011-06-01	3.81
2011-07-01	3.83
2011-08-01	3.17
2011-09-01	2.76
2011-10-01	2.80
2011-11-01	2.67
2011-12-01	2.64
2012-01-01	2.66
2012-02-01	2.70
2012-03-01	2.90
2012-04-01	2.78
2012-05-01	2.50
2012-06-01	2.29
2012-07-01	2.18
2012-08-01	2.36
2012-09-01	2.45
2012-10-01	2.47
2012-11-01	2.38
2012-12-01	2.46
2013-01-01	2.66
2013-02-01	2.76
2013-03-01	2.78
2013-04-01	2.54
2013-05-01	2.72
2013-06-01	3.06
2013-07-01	3.28
2013-08-01	3.46
2013-09-01	3.51
2013-10-01	3.37
2013-11-01	3.49
2013-12-01	3.61
2014-01-01	3.50
2014-02-01	3.38
2014-03-01	3.35
2014-04-01	3.26
2014-05-01	3.11
2014-06-01	3.15
2014-07-01	3.07
2014-08-01	2.94
2014-09-01	3.02
2014-10-01	2.79
2014-11-01	2.81
2014-12-01	2.62
2015-01-01	2.26
2015-02-01	2.39
2015-03-01	2.46
2015-04-01	2.39
2015-05-01	2.74
2015-06-01	2.90
2015-07-01	2.83
2015-08-01	2.64
2015-09-01	2.73
2015-10-01	2.63
2015-11-01	2.80
2015-12-01	2.73
2016-01-01	2.60
2016-02-01	2.34
2016-03-01	2.42
2016-04-01	2.35
2016-05-01	2.35
2016-06-01	2.17
2016-07-01	1.96
2016-08-01	2.02
2016-09-01	2.13
2016-10-01	2.28
2016-11-01	2.66
2016-12-01	2.96
2017-01-01	2.86
2017-02-01	2.88
2017-03-01	2.94
2017-04-01	2.78
2017-05-01	2.80
2017-06-01	2.64
2017-07-01	2.74
2017-08-01	2.64
2017-09-01	2.62
2017-10-01	2.73
2017-11-01	2.68
2017-12-01	2.67
2018-01-01	2.79
2018-02-01	3.07
2018-03-01	3.03
2018-04-01	3.01
2018-05-01	3.09
2018-06-01	3.01
2018-07-01	2.98
2018-08-01	3.01
2018-09-01	3.12
2018-10-01	3.30