Month	Percent
1968-01-01	5.10
1968-02-01	5.15
1968-03-01	5.15
1968-04-01	5.15
1968-05-01	5.30
1968-06-01	5.50
1968-07-01	5.10
1968-08-01	5.10
1968-09-01	5.05
1968-10-01	5.00
1968-11-01	4.90
1968-12-01	4.90
1969-01-01	5.10
1969-02-01	5.10
1969-03-01	5.15
1969-04-01	5.40
1969-05-01	5.50
1969-06-01	5.90
1969-07-01	5.80
1969-08-01	6.10
1969-09-01	5.80
1969-10-01	5.60
1969-11-01	5.70
1969-12-01	5.65
1970-01-01	5.80
1970-02-01	6.30
1970-03-01	7.15
1970-04-01	8.60
1970-05-01	9.10
1970-06-01	8.70
1970-07-01	7.40
1970-08-01	6.80
1970-09-01	6.35
1970-10-01	6.40
1970-11-01	6.20
1970-12-01	6.50
1971-01-01	6.60
1971-02-01	7.60
1971-03-01	8.00
1971-04-01	7.80
1971-05-01	7.80
1971-06-01	8.15
1971-07-01	6.80
1971-08-01	6.70
1971-09-01	6.45
1971-10-01	6.30
1971-11-01	6.00
1971-12-01	5.90
1972-01-01	5.60
1972-02-01	5.50
1972-03-01	5.50
1972-04-01	5.50
1972-05-01	5.60
1972-06-01	5.75
1972-07-01	4.60
1972-08-01	4.60
1972-09-01	4.50
1972-10-01	4.30
1972-11-01	5.10
1972-12-01	4.45
1973-01-01	4.70
1973-02-01	4.80
1973-03-01	5.45
1973-04-01	5.80
1973-05-01	6.40
1973-06-01	6.40
1973-07-01	6.50
1973-08-01	6.40
1973-09-01	9.25
1973-10-01	9.65
1973-11-01	9.20
1973-12-01	9.25
1974-01-01	9.25
1974-02-01	9.50
1974-03-01	10.10
1974-04-01	16.25
1974-05-01	21.75
1974-06-01	18.80
1974-07-01	15.00
1974-08-01	14.20
1974-09-01	12.60
1974-10-01	10.40
1974-11-01	10.30
1974-12-01	9.75
1975-01-01	8.95
1975-02-01	9.00
1975-03-01	8.75
1975-04-01	9.80
1975-05-01	8.90
1975-06-01	8.80
1975-07-01	8.15
1975-08-01	8.15
1975-09-01	8.10
1975-10-01	7.95
1975-11-01	8.05
1975-12-01	7.70
1976-01-01	7.65
1976-02-01	8.35
1976-03-01	8.40
1976-04-01	9.61
1976-05-01	10.24
1976-06-01	10.27
1976-07-01	9.67
1976-08-01	9.36
1976-09-01	9.31
1976-10-01	9.06
1976-11-01	9.52
1976-12-01	9.44
1977-01-01	8.93
1977-02-01	9.31
1977-03-01	9.73
1977-04-01	10.86
1977-05-01	10.94
1977-06-01	10.95
1977-07-01	10.72
1977-08-01	10.90
1977-09-01	10.43
1977-10-01	10.02
1977-11-01	10.01
1977-12-01	9.75
1978-01-01	9.49
1978-02-01	9.55
1978-03-01	10.04
1978-04-01	10.86
1978-05-01	10.60
1978-06-01	10.63
1978-07-01	9.84
1978-08-01	9.70
1978-09-01	9.72
1978-10-01	9.74
1978-11-01	9.19
1978-12-01	8.76
1979-01-01	8.51
1979-02-01	8.60
1979-03-01	9.16
1979-04-01	10.42
1979-05-01	10.54
1979-06-01	10.26
1979-07-01	9.86
1979-08-01	9.78
1979-09-01	9.87
1979-10-01	10.04
1979-11-01	10.12
1979-12-01	10.12
1980-01-01	10.03
1980-02-01	10.06
1980-03-01	11.47
1980-04-01	13.28
1980-05-01	13.83
1980-06-01	13.83
1980-07-01	12.87
1980-08-01	12.33
1980-09-01	11.69
1980-10-01	11.22
1980-11-01	11.27
1980-12-01	12.45
1981-01-01	12.61
1981-02-01	13.36
1981-03-01	14.63
1981-04-01	16.69
1981-05-01	16.28
1981-06-01	15.58
1981-07-01	15.39
1981-08-01	15.72
1981-09-01	15.35
1981-10-01	14.69
1981-11-01	14.62
1981-12-01	15.54
1982-01-01	16.21
1982-02-01	17.12
1982-03-01	18.89
1982-04-01	21.39
1982-05-01	18.45
1982-06-01	18.57
1982-07-01	17.29
1982-08-01	17.17
1982-09-01	15.46
1982-10-01	14.57
1982-11-01	14.76
1982-12-01	12.13
1983-01-01	10.65
1983-02-01	13.77
1983-03-01	15.26
1983-04-01	13.92
1983-05-01	12.15
1983-06-01	14.24
1983-07-01	12.80
1983-08-01	12.16
1983-09-01	11.06
1983-10-01	10.94
1983-11-01	10.55
1983-12-01	8.89
1984-01-01	9.76
1984-02-01	12.04
1984-03-01	13.77
1984-04-01	13.88
1984-05-01	13.78
1984-06-01	12.81
1984-07-01	12.30
1984-08-01	11.56
1984-09-01	10.53
1984-10-01	11.17
1984-11-01	11.26
1984-12-01	12.34
1985-01-01	13.35
1985-02-01	13.81
1985-03-01	15.29
1985-04-01	15.79
1985-05-01	15.53
1985-06-01	15.75
1985-07-01	15.14
1985-08-01	16.25
1985-09-01	16.78
1985-10-01	16.36
1985-11-01	18.18
1985-12-01	19.56
1986-01-01	18.97
1986-02-01	18.29
1986-03-01	16.44
1986-04-01	15.76
1986-05-01	14.73
1986-06-01	14.68
1986-07-01	14.85
1986-08-01	17.37
1986-09-01	18.08
1986-10-01	16.82
1986-11-01	15.90
1986-12-01	15.53
1987-01-01	15.86
1987-02-01	16.70
1987-03-01	16.41
1987-04-01	15.08
1987-05-01	14.14
1987-06-01	13.68
1987-07-01	12.99
1987-08-01	12.54
1987-09-01	11.70
1987-10-01	11.99
1987-11-01	12.45
1987-12-01	11.46
1988-01-01	11.05
1988-02-01	10.95
1988-03-01	10.95
1988-04-01	11.39
1988-05-01	12.28
1988-06-01	13.10
1988-07-01	13.08
1988-08-01	13.32
1988-09-01	13.64
1988-10-01	14.00
1988-11-01	14.73
1988-12-01	15.11
1989-01-01	15.56
1989-02-01	16.54
1989-03-01	17.25
1989-04-01	17.46
1989-05-01	17.52
1989-06-01	18.37
1989-07-01	18.06
1989-08-01	17.96
1989-09-01	18.12
1989-10-01	18.36
1989-11-01	18.25
1989-12-01	17.89
1990-01-01	17.33
1990-02-01	16.20
1990-03-01	15.84
1990-04-01	15.14
1990-05-01	15.05
1990-06-01	15.02
1990-07-01	14.83
1990-08-01	13.92
1990-09-01	13.52
1990-10-01	13.07
1990-11-01	12.41
1990-12-01	12.19
1991-01-01	11.93
1991-02-01	11.62
1991-03-01	11.49
1991-04-01	11.36
1991-05-01	10.72
1991-06-01	10.39
1991-07-01	10.34
1991-08-01	10.13
1991-09-01	9.58
1991-10-01	8.97
1991-11-01	8.34
1991-12-01	7.84
1992-01-01	7.45
1992-02-01	7.52
1992-03-01	7.51
1992-04-01	7.18
1992-05-01	6.56
1992-06-01	6.42
1992-07-01	5.64
1992-08-01	5.73
1992-09-01	5.94
1992-10-01	5.86
1992-11-01	5.88
1992-12-01	5.90
1993-01-01	5.88
1993-02-01	5.82
1993-03-01	5.38
1993-04-01	5.27
1993-05-01	5.15
1993-06-01	5.22
1993-07-01	5.05
1993-08-01	4.78
1993-09-01	4.86
1993-10-01	4.81
1993-11-01	4.78
1993-12-01	4.82
1994-01-01	4.81
1994-02-01	4.80
1994-03-01	4.88
1994-04-01	4.92
1994-05-01	4.85
1994-06-01	5.12
1994-07-01	5.41
1994-08-01	5.60
1994-09-01	5.93
1994-10-01	6.45
1994-11-01	7.16
1994-12-01	7.95
1995-01-01	8.37
1995-02-01	8.08
1995-03-01	8.13
1995-04-01	7.89
1995-05-01	7.70
1995-06-01	7.55
1995-07-01	7.56
1995-08-01	7.58
1995-09-01	7.49
1995-10-01	7.47
1995-11-01	7.46
1995-12-01	7.43
1996-01-01	7.46
1996-02-01	7.47
1996-03-01	7.53
1996-04-01	7.57
1996-05-01	7.55
1996-06-01	7.57
1996-07-01	7.56
1996-08-01	6.92
1996-09-01	6.91
1996-10-01	6.70
1996-11-01	6.45
1996-12-01	6.13
1997-01-01	5.82
1997-02-01	5.91
1997-03-01	6.05
1997-04-01	6.04
1997-05-01	5.87
1997-06-01	5.35
1997-07-01	5.19
1997-08-01	4.90
1997-09-01	4.77
1997-10-01	4.83
1997-11-01	4.95
1997-12-01	5.07
1998-01-01	4.99
1998-02-01	4.97
1998-03-01	4.96
1998-04-01	4.92
1998-05-01	4.96
1998-06-01	5.32
1998-07-01	5.17
1998-08-01	5.19
1998-09-01	5.03
1998-10-01	4.83
1998-11-01	4.88
1998-12-01	4.80
1999-01-01	4.79
1999-02-01	4.77
1999-03-01	4.81
1999-04-01	4.76
1999-05-01	4.86
1999-06-01	4.93
1999-07-01	4.89
1999-08-01	4.92
1999-09-01	5.01
1999-10-01	5.31
1999-11-01	5.44
1999-12-01	5.65
2000-01-01	5.66
2000-02-01	5.80
2000-03-01	5.89
2000-04-01	6.04
2000-05-01	6.31
2000-06-01	6.23
2000-07-01	6.20
2000-08-01	6.49
2000-09-01	6.57
2000-10-01	6.41
2000-11-01	6.33
2000-12-01	6.20
2001-01-01	5.91
2001-02-01	5.59
2001-03-01	5.14
2001-04-01	4.86
2001-05-01	4.89
2001-06-01	4.97
2001-07-01	5.04
2001-08-01	4.95
2001-09-01	4.55
2001-10-01	4.36
2001-11-01	4.28
2001-12-01	4.25
2002-01-01	4.26
2002-02-01	4.31
2002-03-01	4.46
2002-04-01	4.59
2002-05-01	4.84
2002-06-01	5.07
2002-07-01	4.98
2002-08-01	4.96
2002-09-01	4.92
2002-10-01	4.90
2002-11-01	4.84
2002-12-01	4.83
2003-01-01	4.80
2003-02-01	4.75
2003-03-01	4.76
2003-04-01	4.79
2003-05-01	4.78
2003-06-01	4.67
2003-07-01	4.72
2003-08-01	4.82
2003-09-01	4.91
2003-10-01	4.97
2003-11-01	5.31
2003-12-01	5.47
2004-01-01	5.55
2004-02-01	5.57
2004-03-01	5.51
2004-04-01	5.54
2004-05-01	5.51
2004-06-01	5.49
2004-07-01	5.46
2004-08-01	5.44
2004-09-01	5.42
2004-10-01	5.41
2004-11-01	5.43
2004-12-01	5.41
2005-01-01	5.42
2005-02-01	5.63
2005-03-01	5.81
2005-04-01	5.75
2005-05-01	5.68
2005-06-01	5.66
2005-07-01	5.65
2005-08-01	5.62
2005-09-01	5.62
2005-10-01	5.63
2005-11-01	5.63
2005-12-01	5.63
2006-01-01	5.63
2006-02-01	5.61
2006-03-01	5.61
2006-04-01	5.69
2006-05-01	5.87
2006-06-01	5.96
2006-07-01	6.05
2006-08-01	6.19
2006-09-01	6.21
2006-10-01	6.28
2006-11-01	6.37
2006-12-01	6.39
2007-01-01	6.43
2007-02-01	6.37
2007-03-01	6.43
2007-04-01	6.48
2007-05-01	6.37
2007-06-01	6.42
2007-07-01	6.47
2007-08-01	6.75
2007-09-01	6.94
2007-10-01	6.91
2007-11-01	7.15
2007-12-01	7.29
2008-01-01	7.18
2008-02-01	7.69
2008-03-01	7.90
2008-04-01	7.84
2008-05-01	7.75
2008-06-01	7.81
2008-07-01	7.75
2008-08-01	7.31
2008-09-01	7.27
2008-10-01	6.03
2008-11-01	4.76
2008-12-01	4.39
2009-01-01	3.74
2009-02-01	3.16
2009-03-01	3.16
2009-04-01	3.10
2009-05-01	3.13
2009-06-01	3.25
2009-07-01	3.14
2009-08-01	3.30
2009-09-01	3.37
2009-10-01	3.78
2009-11-01	3.95
2009-12-01	4.13
2010-01-01	4.20
2010-02-01	4.16
2010-03-01	4.33
2010-04-01	4.55
2010-05-01	4.81
2010-06-01	4.89
2010-07-01	4.84
2010-08-01	4.74
2010-09-01	4.82
2010-10-01	4.81
2010-11-01	5.02
2010-12-01	5.03
2011-01-01	4.96
2011-02-01	4.92
2011-03-01	4.92
2011-04-01	4.90
2011-05-01	5.00
2011-06-01	4.99
2011-07-01	4.96
2011-08-01	4.86
2011-09-01	4.81
2011-10-01	4.73
2011-11-01	4.62
2011-12-01	4.51
2012-01-01	4.41
2012-02-01	4.37
2012-03-01	4.44
2012-04-01	4.20
2012-05-01	3.66
2012-06-01	3.49
2012-07-01	3.55
2012-08-01	3.62
2012-09-01	3.49
2012-10-01	3.16
2012-11-01	3.24
2012-12-01	3.11
2013-01-01	3.00
2013-02-01	2.95
2013-03-01	3.05
2013-04-01	3.02
2013-05-01	2.82
2013-06-01	2.80
2013-07-01	2.76
2013-08-01	2.60
2013-09-01	2.58
2013-10-01	2.58
2013-11-01	2.59
2013-12-01	2.61
2014-01-01	2.62
2014-02-01	2.63
2014-03-01	2.66
2014-04-01	2.68
2014-05-01	2.69
2014-06-01	2.70
2014-07-01	2.65
2014-08-01	2.63
2014-09-01	2.66
2014-10-01	2.72
2014-11-01	2.75
2014-12-01	2.75
2015-01-01	2.70
2015-02-01	2.36
2015-03-01	2.30
2015-04-01	2.25
2015-05-01	2.15
2015-06-01	2.15
2015-07-01	2.14
2015-08-01	2.14
2015-09-01	2.17
2015-10-01	2.15
2015-11-01	2.22
2015-12-01	2.34
2016-01-01	2.30
2016-02-01	2.28
2016-03-01	2.31
2016-04-01	2.26
2016-05-01	2.01
2016-06-01	1.99
2016-07-01	1.93
2016-08-01	1.76
2016-09-01	1.73
2016-10-01	1.75
2016-11-01	1.76
2016-12-01	1.78
2017-01-01	1.78
2017-02-01	1.78
2017-03-01	1.79
2017-04-01	1.77
2017-05-01	1.73
2017-06-01	1.72
2017-07-01	1.70
2017-08-01	1.70
2017-09-01	1.72
2017-10-01	1.70
2017-11-01	1.72
2017-12-01	1.77
2018-01-01	1.79
2018-02-01	1.77
2018-03-01	1.93
2018-04-01	2.06
2018-05-01	1.96
2018-06-01	2.07
2018-07-01	2.02
2018-08-01	1.96
2018-09-01	1.93
2018-10-01	1.93