Month	Percent
1960-01-01	3.66
1960-02-01	3.73
1960-03-01	3.72
1960-04-01	3.77
1960-05-01	3.79
1960-06-01	4.00
1960-07-01	4.00
1960-08-01	4.50
1960-09-01	4.50
1960-10-01	4.50
1960-11-01	4.50
1960-12-01	4.50
1961-01-01	4.50
1961-02-01	4.50
1961-03-01	4.50
1961-04-01	4.50
1961-05-01	5.00
1961-06-01	5.00
1961-07-01	5.00
1961-08-01	5.00
1961-09-01	5.00
1961-10-01	5.00
1961-11-01	5.00
1961-12-01	4.50
1962-01-01	4.50
1962-02-01	4.50
1962-03-01	4.50
1962-04-01	4.50
1962-05-01	3.46
1962-06-01	3.15
1962-07-01	2.97
1962-08-01	2.70
1962-09-01	2.71
1962-10-01	2.62
1962-11-01	2.31
1962-12-01	2.35
1963-01-01	2.38
1963-02-01	2.49
1963-03-01	2.53
1963-04-01	2.52
1963-05-01	2.63
1963-06-01	2.67
1963-07-01	2.72
1963-08-01	2.58
1963-09-01	2.35
1963-10-01	2.22
1963-11-01	2.30
1963-12-01	2.46
1964-01-01	2.82
1964-02-01	3.01
1964-03-01	3.13
1964-04-01	3.08
1964-05-01	3.50
1964-06-01	3.50
1964-07-01	4.00
1964-08-01	4.00
1964-09-01	4.00
1964-10-01	4.00
1964-11-01	4.00
1964-12-01	4.50
1965-01-01	4.50
1965-02-01	4.50
1965-03-01	5.00
1965-04-01	5.00
1965-05-01	5.00
1965-06-01	5.00
1965-07-01	5.00
1965-08-01	5.00
1965-09-01	5.00
1965-10-01	5.00
1965-11-01	5.00
1965-12-01	5.00
1966-01-01	5.00
1966-02-01	5.00
1966-03-01	5.00
1966-04-01	5.00
1966-05-01	5.00
1966-06-01	5.00
1966-07-01	6.00
1966-08-01	6.00
1966-09-01	6.00
1966-10-01	6.00
1966-11-01	6.00
1966-12-01	6.00
1967-01-01	6.00
1967-02-01	6.00
1967-03-01	6.00
1967-04-01	6.00
1967-05-01	6.00
1967-06-01	6.00
1967-07-01	6.00
1967-08-01	6.00
1967-09-01	6.00
1967-10-01	6.00
1967-11-01	6.00
1967-12-01	6.00
1968-01-01	6.00
1968-02-01	6.00
1968-03-01	6.00
1968-04-01	6.00
1968-05-01	6.00
1968-06-01	6.00
1968-07-01	6.00
1968-08-01	5.50
1968-09-01	5.50
1968-10-01	5.50
1968-11-01	5.50
1968-12-01	5.50
1969-01-01	5.50
1969-02-01	5.50
1969-03-01	5.50
1969-04-01	5.50
1969-05-01	5.50
1969-06-01	5.50
1969-07-01	5.50
1969-08-01	5.50
1969-09-01	5.50
1969-10-01	5.50
1969-11-01	5.50
1969-12-01	5.50
1970-01-01	5.50
1970-02-01	5.50
1970-03-01	5.50
1970-04-01	5.50
1970-05-01	5.50
1970-06-01	5.50
1970-07-01	5.50
1970-08-01	5.50
1970-09-01	5.50
1970-10-01	5.50
1970-11-01	5.50
1970-12-01	5.50
1971-01-01	5.50
1971-02-01	5.50
1971-03-01	6.50
1971-04-01	6.50
1971-05-01	6.50
1971-06-01	6.50
1971-07-01	6.50
1971-08-01	6.50
1971-09-01	6.50
1971-10-01	6.50
1971-11-01	6.50
1971-12-01	6.50
1972-01-01	6.50
1972-02-01	6.50
1972-03-01	6.50
1972-04-01	6.50
1972-05-01	6.50
1972-06-01	6.50
1972-07-01	6.50
1972-08-01	6.00
1972-09-01	6.00
1972-10-01	6.00
1972-11-01	6.00
1972-12-01	6.00
1973-01-01	6.00
1973-02-01	6.00
1973-03-01	5.50
1973-04-01	5.50
1973-05-01	5.50
1973-06-01	5.50
1973-07-01	5.50
1973-08-01	5.50
1973-09-01	3.15
1973-10-01	3.14
1973-11-01	3.30
1973-12-01	3.78
1974-01-01	5.12
1974-02-01	5.22
1974-03-01	5.32
1974-04-01	5.27
1974-05-01	5.32
1974-06-01	6.22
1974-07-01	6.34
1974-08-01	6.86
1974-09-01	6.68
1974-10-01	6.60
1974-11-01	6.54
1974-12-01	6.48
1975-01-01	6.42
1975-02-01	6.40
1975-03-01	6.45
1975-04-01	6.25
1975-05-01	6.12
1975-06-01	6.05
1975-07-01	6.05
1975-08-01	6.91
1975-09-01	7.14
1975-10-01	7.34
1975-11-01	7.34
1975-12-01	7.42
1976-01-01	7.50
1976-02-01	7.66
1976-03-01	7.78
1976-04-01	7.74
1976-05-01	7.72
1976-06-01	7.84
1976-07-01	8.26
1976-08-01	8.24
1976-09-01	8.26
1976-10-01	8.22
1976-11-01	8.22
1976-12-01	8.28
1977-01-01	8.34
1977-02-01	8.38
1977-03-01	8.39
1977-04-01	8.35
1977-05-01	8.33
1977-06-01	8.36
1977-07-01	8.39
1977-08-01	8.38
1977-09-01	8.42
1977-10-01	8.42
1977-11-01	8.40
1977-12-01	8.41
1978-01-01	8.45
1978-02-01	8.46
1978-03-01	8.50
1978-04-01	8.47
1978-05-01	8.48
1978-06-01	8.50
1978-07-01	8.49
1978-08-01	8.15
1978-09-01	8.16
1978-10-01	7.99
1978-11-01	7.85
1978-12-01	7.87
1979-01-01	7.80
1979-02-01	7.21
1979-03-01	6.55
1979-04-01	6.00
1979-05-01	5.93
1979-06-01	5.84
1979-07-01	5.48
1979-08-01	4.95
1979-09-01	4.88
1979-10-01	4.30
1979-11-01	4.40
1979-12-01	4.70
1980-01-01	4.69
1980-02-01	4.77
1980-03-01	4.78
1980-04-01	4.85
1980-05-01	5.16
1980-06-01	5.08
1980-07-01	4.90
1980-08-01	5.02
1980-09-01	5.22
1980-10-01	5.50
1980-11-01	6.05
1980-12-01	6.54
1981-01-01	7.27
1981-02-01	7.95
1981-03-01	8.18
1981-04-01	8.24
1981-05-01	9.38
1981-06-01	10.50
1981-07-01	11.75
1981-08-01	11.78
1981-09-01	11.83
1981-10-01	12.39
1981-11-01	12.90
1981-12-01	14.54
1982-01-01	15.25
1982-02-01	16.24
1982-03-01	16.34
1982-04-01	16.30
1982-05-01	16.46
1982-06-01	16.76
1982-07-01	16.67
1982-08-01	16.47
1982-09-01	16.60
1982-10-01	15.69
1982-11-01	14.82
1982-12-01	14.35
1983-01-01	12.81
1983-02-01	10.06
1983-03-01	12.24
1983-04-01	12.21
1983-05-01	12.47
1983-06-01	13.99
1983-07-01	14.46
1983-08-01	16.06
1983-09-01	16.00
1983-10-01	15.57
1983-11-01	17.24
1983-12-01	17.75
1984-01-01	17.75
1984-02-01	17.75
1984-03-01	17.75
1984-04-01	17.75
1984-05-01	17.75
1984-06-01	17.75
1984-07-01	18.75
1984-08-01	21.75
1984-09-01	21.75
1984-10-01	21.75
1984-11-01	20.75
1984-12-01	20.75
1985-01-01	21.75
1985-02-01	21.75
1985-03-01	21.75
1985-04-01	21.75
1985-05-01	19.75
1985-06-01	18.75
1985-07-01	17.75
1985-08-01	16.00
1985-09-01	15.00
1985-10-01	14.00
1985-11-01	13.00
1985-12-01	13.00
1986-01-01	12.00
1986-02-01	12.00
1986-03-01	12.00
1986-04-01	12.00
1986-05-01	11.00
1986-06-01	11.00
1986-07-01	11.00
1986-08-01	10.50
1986-09-01	10.00
1986-10-01	10.00
1986-11-01	10.00
1986-12-01	9.50
1987-01-01	9.50
1987-02-01	9.50
1987-03-01	9.50
1987-04-01	9.50
1987-05-01	9.50
1987-06-01	9.50
1987-07-01	9.50
1987-08-01	9.50
1987-09-01	9.50
1987-10-01	9.50
1987-11-01	9.50
1987-12-01	9.50
1988-01-01	9.50
1988-02-01	9.50
1988-03-01	10.50
1988-04-01	10.50
1988-05-01	11.50
1988-06-01	11.50
1988-07-01	12.50
1988-08-01	12.50
1988-09-01	12.50
1988-10-01	12.50
1988-11-01	14.50
1988-12-01	14.50
1989-01-01	14.50
1989-02-01	14.50
1989-03-01	14.50
1989-04-01	16.00
1989-05-01	17.00
1989-06-01	17.00
1989-07-01	17.00
1989-08-01	17.00
1989-09-01	17.00
1989-10-01	18.00
1989-11-01	18.00
1989-12-01	18.00
1990-01-01	18.00
1990-02-01	18.00
1990-03-01	18.00
1990-04-01	18.00
1990-05-01	18.00
1990-06-01	18.00
1990-07-01	18.00
1990-08-01	18.00
1990-09-01	18.00
1990-10-01	18.00
1990-11-01	18.00
1990-12-01	18.00
1991-01-01	18.00
1991-02-01	18.00
1991-03-01	17.00
1991-04-01	17.00
1991-05-01	17.00
1991-06-01	17.00
1991-07-01	17.00
1991-08-01	17.00
1991-09-01	17.00
1991-10-01	17.00
1991-11-01	17.00
1991-12-01	17.00
1992-01-01	17.00
1992-02-01	17.00
1992-03-01	16.00
1992-04-01	16.00
1992-05-01	16.00
1992-06-01	15.00
1992-07-01	15.00
1992-08-01	15.00
1992-09-01	15.00
1992-10-01	15.00
1992-11-01	14.00
1992-12-01	14.00
1993-01-01	14.00
1993-02-01	13.00
1993-03-01	13.00
1993-04-01	13.00
1993-05-01	13.00
1993-06-01	13.00
1993-07-01	13.00
1993-08-01	13.00
1993-09-01	13.00
1993-10-01	12.00
1993-11-01	12.00
1993-12-01	12.00
1994-01-01	12.00
1994-02-01	12.00
1994-03-01	12.00
1994-04-01	12.00
1994-05-01	12.00
1994-06-01	12.00
1994-07-01	12.00
1994-08-01	12.00
1994-09-01	13.00
1994-10-01	13.00
1994-11-01	13.00
1994-12-01	13.00
1995-01-01	13.00
1995-02-01	14.00
1995-03-01	14.00
1995-04-01	14.00
1995-05-01	14.00
1995-06-01	15.00
1995-07-01	15.00
1995-08-01	15.00
1995-09-01	15.00
1995-10-01	15.00
1995-11-01	15.00
1995-12-01	15.00
1996-01-01	15.00
1996-02-01	15.00
1996-03-01	15.00
1996-04-01	16.00
1996-05-01	16.00
1996-06-01	16.00
1996-07-01	16.00
1996-08-01	16.00
1996-09-01	16.00
1996-10-01	16.00
1996-11-01	17.00
1996-12-01	17.00
1997-01-01	17.00
1997-02-01	17.00
1997-03-01	17.00
1997-04-01	17.00
1997-05-01	17.00
1997-06-01	17.00
1997-07-01	17.00
1997-08-01	17.00
1997-09-01	17.00
1997-10-01	16.00
1997-11-01	16.00
1997-12-01	16.00
1998-01-01	16.00
1998-02-01	16.00
1998-03-01	15.00
1998-04-01	14.93
1998-05-01	18.00
1998-06-01	20.21
1998-07-01	21.35
1998-08-01	21.85
1998-09-01	21.85
1998-10-01	20.72
1998-11-01	19.73
1998-12-01	19.32
1999-01-01	18.83
1999-02-01	17.36
1999-03-01	16.50
1999-04-01	15.66
1999-05-01	15.46
1999-06-01	14.91
1999-07-01	13.65
1999-08-01	13.44
1999-09-01	12.40
1999-10-01	12.19
1999-11-01	12.00
1999-12-01	12.00
2000-01-01	11.75
2000-02-01	11.75
2000-03-01	11.75
2000-04-01	11.75
2000-05-01	11.75
2000-06-01	11.75
2000-07-01	11.75
2000-08-01	11.75
2000-09-01	11.75
2000-10-01	12.00
2000-11-01	12.00
2000-12-01	12.00
2001-01-01	12.00
2001-02-01	12.00
2001-03-01	12.00
2001-04-01	12.00
2001-05-01	12.00
2001-06-01	11.00
2001-07-01	11.00
2001-08-01	11.00
2001-09-01	9.50
2001-10-01	9.50
2001-11-01	9.50
2001-12-01	9.50
2002-01-01	10.50
2002-02-01	10.50
2002-03-01	11.50
2002-04-01	11.50
2002-05-01	11.50
2002-06-01	12.50
2002-07-01	12.50
2002-08-01	12.50
2002-09-01	13.50
2002-10-01	13.50
2002-11-01	13.50
2002-12-01	13.50
2003-01-01	13.50
2003-02-01	13.50
2003-03-01	13.50
2003-04-01	13.50
2003-05-01	13.50
2003-06-01	12.00
2003-07-01	12.00
2003-08-01	11.00
2003-09-01	10.00
2003-10-01	8.50
2003-11-01	8.50
2003-12-01	8.00
2004-01-01	8.00
2004-02-01	8.00
2004-03-01	8.00
2004-04-01	8.00
2004-05-01	8.00
2004-06-01	8.00
2004-07-01	8.00
2004-08-01	7.50
2004-09-01	7.50
2004-10-01	7.50
2004-11-01	7.50
2004-12-01	7.50
2005-01-01	7.50
2005-02-01	7.50
2005-03-01	7.50
2005-04-01	7.00
2005-05-01	7.00
2005-06-01	7.00
2005-07-01	7.00
2005-08-01	7.00
2005-09-01	7.00
2005-10-01	7.00
2005-11-01	7.00
2005-12-01	7.00
2006-01-01	7.00
2006-02-01	7.00
2006-03-01	7.00
2006-04-01	7.00
2006-05-01	7.00
2006-06-01	7.50
2006-07-01	7.50
2006-08-01	8.00
2006-09-01	8.00
2006-10-01	8.50
2006-11-01	8.50
2006-12-01	9.00
2007-01-01	9.00
2007-02-01	9.00
2007-03-01	9.00
2007-04-01	9.00
2007-05-01	9.00
2007-06-01	9.50
2007-07-01	9.50
2007-08-01	10.00
2007-09-01	10.00
2007-10-01	10.50
2007-11-01	10.50
2007-12-01	11.00
2008-01-01	11.00
2008-02-01	11.00
2008-03-01	11.00
2008-04-01	11.50
2008-05-01	11.50
2008-06-01	12.00
2008-07-01	12.00
2008-08-01	12.00
2008-09-01	12.00
2008-10-01	12.00
2008-11-01	12.00
2008-12-01	11.50
2009-01-01	11.50
2009-02-01	10.50
2009-03-01	9.50
2009-04-01	9.50
2009-05-01	7.50
2009-06-01	7.50
2009-07-01	7.50
2009-08-01	7.00
2009-09-01	7.00
2009-10-01	7.00
2009-11-01	7.00
2009-12-01	7.00
2010-01-01	7.00
2010-02-01	7.00
2010-03-01	6.50
2010-04-01	6.50
2010-05-01	6.50
2010-06-01	6.50
2010-07-01	6.50
2010-08-01	6.50
2010-09-01	6.00
2010-10-01	6.00
2010-11-01	5.50
2010-12-01	5.50
2011-01-01	5.50
2011-02-01	5.50
2011-03-01	5.50
2011-04-01	5.50
2011-05-01	5.50
2011-06-01	5.50
2011-07-01	5.50
2011-08-01	5.50
2011-09-01	5.50
2011-10-01	5.50
2011-11-01	5.50
2011-12-01	5.50
2012-01-01	5.50
2012-02-01	5.50
2012-03-01	5.50
2012-04-01	5.50
2012-05-01	5.50
2012-06-01	5.50
2012-07-01	5.00
2012-08-01	5.00
2012-09-01	5.00
2012-10-01	5.00
2012-11-01	5.00
2012-12-01	5.00
2013-01-01	5.00
2013-02-01	5.00
2013-03-01	5.00
2013-04-01	5.00
2013-05-01	5.00
2013-06-01	5.00
2013-07-01	5.00
2013-08-01	5.00
2013-09-01	5.00
2013-10-01	5.00
2013-11-01	5.00
2013-12-01	5.00
2014-01-01	5.50
2014-02-01	5.50
2014-03-01	5.50
2014-04-01	5.50
2014-05-01	5.50
2014-06-01	5.50
2014-07-01	5.75
2014-08-01	5.75
2014-09-01	5.75
2014-10-01	5.75
2014-11-01	5.75
2014-12-01	5.75
2015-01-01	5.75
2015-02-01	5.75
2015-03-01	5.75
2015-04-01	5.75
2015-05-01	5.75
2015-06-01	5.75
2015-07-01	6.00
2015-08-01	6.00
2015-09-01	6.00
2015-10-01	6.00
2015-11-01	6.25
2015-12-01	6.25
2016-01-01	6.75
2016-02-01	6.75
2016-03-01	7.00
2016-04-01	7.00
2016-05-01	7.00
2016-06-01	7.00
2016-07-01	7.00
2016-08-01	7.00
2016-09-01	7.00
2016-10-01	7.00
2016-11-01	7.00
2016-12-01	7.00
2017-01-01	7.00
2017-02-01	7.00
2017-03-01	7.00
2017-04-01	7.00
2017-05-01	7.00
2017-06-01	7.00
2017-07-01	6.75
2017-08-01	6.75
2017-09-01	6.75
2017-10-01	6.75
2017-11-01	6.75
2017-12-01	6.75
2018-01-01	6.75
2018-02-01	6.75
2018-03-01	6.50
2018-04-01	6.50
2018-05-01	6.50
2018-06-01	6.50
2018-07-01	6.50
2018-08-01	6.50
2018-09-01	6.50
2018-10-01	6.50