Month	Percent
1960-01-01	5.17
1960-02-01	5.17
1960-03-01	5.13
1960-04-01	5.15
1960-05-01	5.22
1960-06-01	5.22
1960-07-01	5.25
1960-08-01	5.23
1960-09-01	5.21
1960-10-01	5.21
1960-11-01	5.12
1960-12-01	5.12
1961-01-01	5.16
1961-02-01	5.22
1961-03-01	5.22
1961-04-01	5.22
1961-05-01	5.50
1961-06-01	5.38
1961-07-01	5.38
1961-08-01	5.38
1961-09-01	5.38
1961-10-01	5.42
1961-11-01	5.38
1961-12-01	5.38
1962-01-01	5.31
1962-02-01	5.32
1962-03-01	5.37
1962-04-01	5.16
1962-05-01	5.08
1962-06-01	4.79
1962-07-01	4.79
1962-08-01	4.78
1962-09-01	4.78
1962-10-01	4.83
1962-11-01	4.83
1962-12-01	4.83
1963-01-01	4.75
1963-02-01	4.54
1963-03-01	4.60
1963-04-01	4.71
1963-05-01	4.79
1963-06-01	4.96
1963-07-01	4.96
1963-08-01	4.96
1963-09-01	5.18
1963-10-01	5.21
1963-11-01	5.22
1963-12-01	5.22
1964-01-01	5.22
1964-02-01	5.60
1964-03-01	5.58
1964-04-01	5.64
1964-05-01	5.64
1964-06-01	5.64
1964-07-01	5.64
1964-08-01	5.67
1964-09-01	5.64
1964-10-01	5.66
1964-11-01	5.87
1964-12-01	5.87
1965-01-01	5.87
1965-02-01	5.87
1965-03-01	5.87
1965-04-01	6.27
1965-05-01	6.27
1965-06-01	6.27
1965-07-01	6.27
1965-08-01	6.27
1965-09-01	6.27
1965-10-01	6.27
1965-11-01	6.27
1965-12-01	6.38
1966-01-01	6.51
1966-02-01	6.55
1966-03-01	6.55
1966-04-01	6.55
1966-05-01	6.55
1966-06-01	6.80
1966-07-01	6.80
1966-08-01	6.65
1966-09-01	6.52
1966-10-01	6.52
1966-11-01	6.48
1966-12-01	6.35
1967-01-01	6.35
1967-02-01	6.26
1967-03-01	5.89
1967-04-01	5.90
1967-05-01	5.90
1967-06-01	5.90
1967-07-01	5.96
1967-08-01	5.95
1967-09-01	5.95
1967-10-01	5.95
1967-11-01	5.92
1967-12-01	6.80
1968-01-01	6.59
1968-02-01	6.29
1968-03-01	6.29
1968-04-01	6.34
1968-05-01	6.33
1968-06-01	6.29
1968-07-01	6.31
1968-08-01	6.31
1968-09-01	6.33
1968-10-01	6.18
1968-11-01	6.19
1968-12-01	6.19
1969-01-01	6.27
1969-02-01	6.27
1969-03-01	6.72
1969-04-01	6.78
1969-05-01	7.02
1969-06-01	6.98
1969-07-01	7.29
1969-08-01	7.27
1969-09-01	7.28
1969-10-01	7.29
1969-11-01	7.25
1969-12-01	7.27
1970-01-01	7.28
1970-02-01	7.28
1970-03-01	7.29
1970-04-01	7.29
1970-05-01	7.31
1970-06-01	7.43
1970-07-01	7.48
1970-08-01	7.51
1970-09-01	7.52
1970-10-01	7.52
1970-11-01	7.47
1970-12-01	7.32
1971-01-01	7.29
1971-02-01	7.29
1971-03-01	7.30
1971-04-01	7.30
1971-05-01	7.29
1971-06-01	7.28
1971-07-01	7.29
1971-08-01	7.30
1971-09-01	7.10
1971-10-01	7.11
1971-11-01	7.12
1971-12-01	7.14
1972-01-01	7.21
1972-02-01	7.24
1972-03-01	7.25
1972-04-01	7.26
1972-05-01	7.27
1972-06-01	7.27
1972-07-01	7.29
1972-08-01	7.33
1972-09-01	7.34
1972-10-01	7.34
1972-11-01	7.36
1972-12-01	7.34
1973-01-01	7.35
1973-02-01	7.36
1973-03-01	7.36
1973-04-01	7.37
1973-05-01	7.40
1973-06-01	7.40
1973-07-01	7.40
1973-08-01	7.41
1973-09-01	7.41
1973-10-01	7.42
1973-11-01	7.37
1973-12-01	7.37
1974-01-01	7.30
1974-02-01	7.27
1974-03-01	7.15
1974-04-01	7.73
1974-05-01	7.83
1974-06-01	7.86
1974-07-01	7.87
1974-08-01	7.87
1974-09-01	8.10
1974-10-01	8.12
1974-11-01	8.15
1974-12-01	8.17
1975-01-01	8.18
1975-02-01	8.17
1975-03-01	8.18
1975-04-01	8.22
1975-05-01	9.00
1975-06-01	9.04
1975-07-01	9.05
1975-08-01	9.08
1975-09-01	9.11
1975-10-01	9.13
1975-11-01	9.14
1975-12-01	9.15
1976-01-01	9.19
1976-02-01	9.12
1976-03-01	9.11
1976-04-01	9.13
1976-05-01	9.14
1976-06-01	9.19
1976-07-01	9.20
1976-08-01	9.22
1976-09-01	9.22
1976-10-01	10.06
1976-11-01	9.63
1976-12-01	9.61
1977-01-01	9.60
1977-02-01	9.63
1977-03-01	9.69
1977-04-01	9.73
1977-05-01	9.75
1977-06-01	9.74
1977-07-01	9.76
1977-08-01	9.75
1977-09-01	9.78
1977-10-01	9.81
1977-11-01	9.83
1977-12-01	9.84
1978-01-01	9.86
1978-02-01	9.87
1978-03-01	10.08
1978-04-01	10.17
1978-05-01	10.19
1978-06-01	10.33
1978-07-01	10.35
1978-08-01	10.01
1978-09-01	10.03
1978-10-01	10.06
1978-11-01	10.07
1978-12-01	10.09
1979-01-01	10.12
1979-02-01	10.12
1979-03-01	10.15
1979-04-01	10.18
1979-05-01	10.20
1979-06-01	10.21
1979-07-01	10.41
1979-08-01	10.44
1979-09-01	10.49
1979-10-01	11.01
1979-11-01	11.04
1979-12-01	11.22
1980-01-01	10.92
1980-02-01	11.24
1980-03-01	11.26
1980-04-01	11.33
1980-05-01	11.31
1980-06-01	11.38
1980-07-01	11.38
1980-08-01	11.46
1980-09-01	12.63
1980-10-01	12.68
1980-11-01	12.71
1980-12-01	12.61
1981-01-01	12.66
1981-02-01	13.60
1981-03-01	13.43
1981-04-01	13.49
1981-05-01	13.56
1981-06-01	13.63
1981-07-01	13.70
1981-08-01	13.74
1981-09-01	13.73
1981-10-01	13.73
1981-11-01	13.77
1981-12-01	12.80
1982-01-01	12.84
1982-02-01	12.76
1982-03-01	12.78
1982-04-01	12.82
1982-05-01	12.79
1982-06-01	13.00
1982-07-01	13.18
1982-08-01	13.23
1982-09-01	13.27
1982-10-01	13.73
1982-11-01	13.09
1982-12-01	13.01
1983-01-01	13.10
1983-02-01	12.83
1983-03-01	12.51
1983-04-01	12.22
1983-05-01	12.14
1983-06-01	12.17
1983-07-01	11.85
1983-08-01	11.84
1983-09-01	12.20
1983-10-01	12.24
1983-11-01	12.44
1983-12-01	12.08
1984-01-01	11.96
1984-02-01	11.81
1984-03-01	12.15
1984-04-01	11.90
1984-05-01	11.55
1984-06-01	11.59
1984-07-01	12.54
1984-08-01	12.61
1984-09-01	12.68
1984-10-01	12.84
1984-11-01	13.16
1984-12-01	12.58
1985-01-01	12.59
1985-02-01	12.58
1985-03-01	13.43
1985-04-01	13.04
1985-05-01	13.09
1985-06-01	13.43
1985-07-01	13.05
1985-08-01	13.14
1985-09-01	13.16
1985-10-01	13.13
1985-11-01	12.94
1985-12-01	12.23
1986-01-01	12.16
1986-02-01	11.83
1986-03-01	11.00
1986-04-01	9.93
1986-05-01	9.98
1986-06-01	9.79
1986-07-01	9.66
1986-08-01	9.76
1986-09-01	9.47
1986-10-01	9.38
1986-11-01	9.65
1986-12-01	10.54
1987-01-01	11.53
1987-02-01	11.28
1987-03-01	10.91
1987-04-01	10.85
1987-05-01	11.52
1987-06-01	11.62
1987-07-01	11.52
1987-08-01	11.74
1987-09-01	11.81
1987-10-01	11.75
1987-11-01	11.33
1987-12-01	11.44
1988-01-01	11.45
1988-02-01	11.07
1988-03-01	11.11
1988-04-01	11.13
1988-05-01	11.31
1988-06-01	11.05
1988-07-01	11.15
1988-08-01	11.39
1988-09-01	11.33
1988-10-01	11.24
1988-11-01	11.09
1988-12-01	11.02
1989-01-01	10.54
1989-02-01	10.58
1989-03-01	11.03
1989-04-01	11.14
1989-05-01	11.12
1989-06-01	11.17
1989-07-01	11.23
1989-08-01	11.15
1989-09-01	11.14
1989-10-01	11.38
1989-11-01	12.22
1989-12-01	12.93
1990-01-01	13.24
1990-02-01	14.37
1990-03-01	14.34
1990-04-01	14.01
1990-05-01	13.60
1990-06-01	13.13
1990-07-01	13.10
1990-08-01	13.55
1990-09-01	13.76
1990-10-01	13.76
1990-11-01	13.30
1990-12-01	12.73
1991-01-01	12.14
1991-02-01	11.34
1991-03-01	11.48
1991-04-01	11.55
1991-05-01	10.93
1991-06-01	10.67
1991-07-01	10.72
1991-08-01	10.67
1991-09-01	10.27
1991-10-01	10.23
1991-11-01	10.17
1991-12-01	10.54
1992-01-01	9.79
1992-02-01	9.79
1992-03-01	9.70
1992-04-01	9.89
1992-05-01	9.94
1992-06-01	10.09
1992-07-01	10.30
1992-08-01	11.13
1992-09-01	11.97
1992-10-01	11.64
1992-11-01	10.82
1992-12-01	9.60
1993-01-01	9.53
1993-02-01	9.00
1993-03-01	8.56
1993-04-01	8.56
1993-05-01	8.14
1993-06-01	7.75
1993-07-01	7.36
1993-08-01	6.64
1993-09-01	6.92
1993-10-01	6.73
1993-11-01	6.56
1993-12-01	6.39
1994-01-01	6.33
1994-02-01	6.44
1994-03-01	7.14
1994-04-01	7.91
1994-05-01	8.18
1994-06-01	9.32
1994-07-01	10.23
1994-08-01	10.82
1994-09-01	10.78
1994-10-01	10.50
1994-11-01	10.51
1994-12-01	10.33
1995-01-01	10.60
1995-02-01	10.27
1995-03-01	10.70
1995-04-01	10.88
1995-05-01	10.29
1995-06-01	10.28
1995-07-01	10.23
1995-08-01	9.89
1995-09-01	9.39
1995-10-01	9.01
1995-11-01	8.68
1995-12-01	8.28
1996-01-01	7.82
1996-02-01	8.11
1996-03-01	8.08
1996-04-01	7.67
1996-05-01	7.67
1996-06-01	7.54
1996-07-01	7.48
1996-08-01	7.31
1996-09-01	7.00
1996-10-01	6.34
1996-11-01	6.24
1996-12-01	5.72
1997-01-01	5.39
1997-02-01	5.61
1997-03-01	6.17
1997-04-01	6.27
1997-05-01	6.11
1997-06-01	5.92
1997-07-01	5.64
1997-08-01	5.82
1997-09-01	5.70
1997-10-01	5.76
1997-11-01	5.88
1997-12-01	5.71
1998-01-01	5.33
1998-02-01	5.19
1998-03-01	5.06
1998-04-01	4.99
1998-05-01	4.98
1998-06-01	4.70
1998-07-01	4.61
1998-08-01	4.60
1998-09-01	4.56
1998-10-01	4.49
1998-11-01	4.16
1998-12-01	3.83
1999-01-01	3.59
1999-02-01	3.67
1999-03-01	3.80
1999-04-01	3.53
1999-05-01	3.80
1999-06-01	4.28
1999-07-01	4.81
1999-08-01	5.09
1999-09-01	5.29
1999-10-01	5.53
1999-11-01	5.17
1999-12-01	5.26
2000-01-01	5.68
2000-02-01	5.76
2000-03-01	5.44
2000-04-01	5.36
2000-05-01	5.34
2000-06-01	5.16
2000-07-01	5.32
2000-08-01	5.25
2000-09-01	5.08
2000-10-01	5.01
2000-11-01	4.90
2000-12-01	4.60
2001-01-01	4.56
2001-02-01	4.51
2001-03-01	4.33
2001-04-01	4.51
2001-05-01	4.82
2001-06-01	5.03
2001-07-01	5.08
2001-08-01	4.77
2001-09-01	4.74
2001-10-01	4.60
2001-11-01	4.49
2001-12-01	4.90
2002-01-01	5.01
2002-02-01	5.18
2002-03-01	5.46
2002-04-01	5.46
2002-05-01	5.45
2002-06-01	5.27
2002-07-01	5.06
2002-08-01	4.83
2002-09-01	4.62
2002-10-01	4.62
2002-11-01	4.54
2002-12-01	4.39
2003-01-01	4.23
2003-02-01	3.97
2003-03-01	4.03
2003-04-01	4.17
2003-05-01	3.77
2003-06-01	3.44
2003-07-01	3.22
2003-08-01	4.18
2003-09-01	4.18
2003-10-01	4.31
2003-11-01	4.45
2003-12-01	4.30
2004-01-01	4.00
2004-02-01	3.86
2004-03-01	3.53
2004-04-01	3.75
2004-05-01	3.97
2004-06-01	4.03
2004-07-01	3.88
2004-08-01	3.72
2004-09-01	3.90
2004-10-01	3.75
2004-11-01	3.60
2004-12-01	3.33
2005-01-01	3.16
2005-02-01	3.10
2005-03-01	3.20
2005-04-01	2.97
2005-05-01	2.72
2005-06-01	2.44
2005-07-01	2.40
2005-08-01	2.56
2005-09-01	2.50
2005-10-01	2.87
2005-11-01	3.08
2005-12-01	3.16
2006-01-01	3.12
2006-02-01	3.17
2006-03-01	3.30
2006-04-01	3.53
2006-05-01	3.54
2006-06-01	3.67
2006-07-01	3.73
2006-08-01	3.69
2006-09-01	3.60
2006-10-01	3.64
2006-11-01	3.58
2006-12-01	3.68
2007-01-01	3.91
2007-02-01	3.91
2007-03-01	3.81
2007-04-01	4.07
2007-05-01	4.20
2007-06-01	4.43
2007-07-01	4.47
2007-08-01	4.24
2007-09-01	4.17
2007-10-01	4.28
2007-11-01	4.13
2007-12-01	4.19
2008-01-01	3.90
2008-02-01	3.78
2008-03-01	3.76
2008-04-01	3.97
2008-05-01	4.17
2008-06-01	4.61
2008-07-01	4.61
2008-08-01	4.20
2008-09-01	3.94
2008-10-01	3.32
2008-11-01	2.74
2008-12-01	2.11
2009-01-01	2.23
2009-02-01	2.19
2009-03-01	2.17
2009-04-01	2.37
2009-05-01	2.74
2009-06-01	2.76
2009-07-01	2.56
2009-08-01	2.76
2009-09-01	2.68
2009-10-01	2.58
2009-11-01	2.52
2009-12-01	2.41
2010-01-01	2.67
2010-02-01	2.62
2010-03-01	2.51
2010-04-01	2.43
2010-05-01	2.07
2010-06-01	2.00
2010-07-01	2.14
2010-08-01	1.93
2010-09-01	2.03
2010-10-01	2.16
2010-11-01	2.26
2010-12-01	2.71
2011-01-01	2.99
2011-02-01	3.18
2011-03-01	3.17
2011-04-01	3.16
2011-05-01	2.86
2011-06-01	2.62
2011-07-01	2.47
2011-08-01	1.84
2011-09-01	1.48
2011-10-01	1.55
2011-11-01	1.27
2011-12-01	1.07
2012-01-01	1.11
2012-02-01	1.44
2012-03-01	1.51
2012-04-01	1.45
2012-05-01	1.15
2012-06-01	1.08
2012-07-01	0.98
2012-08-01	1.07
2012-09-01	1.03
2012-10-01	1.00
2012-11-01	0.94
2012-12-01	0.96
2013-01-01	1.21
2013-02-01	1.40
2013-03-01	1.42
2013-04-01	1.27
2013-05-01	1.31
2013-06-01	1.55
2013-07-01	1.63
2013-08-01	1.81
2013-09-01	2.01
2013-10-01	1.82
2013-11-01	1.64
2013-12-01	1.68
2014-01-01	1.67
2014-02-01	1.51
2014-03-01	1.45
2014-04-01	1.32
2014-05-01	1.15
2014-06-01	1.03
2014-07-01	0.81
2014-08-01	0.70
2014-09-01	0.60
2014-10-01	0.40
2014-11-01	0.26
2014-12-01	0.17
2015-01-01	0.31
2015-02-01	0.12
2015-03-01	0.14
2015-04-01	-0.01
2015-05-01	0.24
2015-06-01	0.40
2015-07-01	0.16
2015-08-01	0.05
2015-09-01	0.05
2015-10-01	0.04
2015-11-01	0.12
2015-12-01	0.22
2016-01-01	0.08
2016-02-01	-0.12
2016-03-01	-0.09
2016-04-01	-0.10
2016-05-01	-0.17
2016-06-01	-0.35
2016-07-01	-0.48
2016-08-01	-0.53
2016-09-01	-0.29
2016-10-01	-0.32
2016-11-01	-0.20
2016-12-01	-0.09
2017-01-01	-0.02
2017-02-01	0.00
2017-03-01	-0.02
2017-04-01	-0.08
2017-05-01	-0.08
2017-06-01	-0.16
2017-07-01	-0.03
2017-08-01	-0.02
2017-09-01	-0.03
2017-10-01	-0.04
2017-11-01	-0.20
2017-12-01	-0.05
2018-01-01	0.24
2018-02-01	0.30
2018-03-01	0.17
2018-04-01	0.10
2018-05-01	0.05
2018-06-01	-0.05
2018-07-01	-0.06
2018-08-01	-0.05
2018-09-01	0.06
2018-10-01	0.13