Month	Percent
1981-01-31	17.5
1981-02-28	16.75
1981-03-31	14.75
1981-04-30	17.125
1981-05-31	18.1875
1981-06-30	17.75
1981-07-31	18.875
1981-08-31	19
1981-09-30	18
1981-10-31	15.75
1981-11-30	12.125
1981-12-31	13.75
1982-01-31	14.8125
1982-02-28	15.125
1982-03-31	15.625
1982-04-30	15
1982-05-31	14.4375
1982-06-30	15.875
1982-07-31	13.125
1982-08-31	11.75
1982-09-30	10.5625
1982-10-31	10.0625
1982-11-30	10
1982-12-31	9.375
1983-01-31	9.5
1983-02-28	8.9375
1983-03-31	9.8125
1983-04-30	9
1983-05-31	9.5625
1983-06-30	9.8125
1983-07-31	10.375
1983-08-31	10.375
1983-09-30	9.625
1983-10-31	9.8125
1983-11-30	9.9375
1983-12-31	10.0625
1984-01-31	9.875
1984-02-29	10.25
1984-03-31	10.813
1984-04-30	11.125
1984-05-31	11.875
1984-06-30	12.25
1984-07-31	11.875
1984-08-31	12
1984-09-30	11.5
1984-10-31	10.063
1984-11-30	9.3125
1984-12-31	8.75
1985-01-31	8.563
1985-02-28	9.5
1985-03-31	9.125
1985-04-30	8.75
1985-05-31	7.8125
1985-06-30	7.8125
1985-07-31	8.3125
1985-08-31	8.125
1985-09-30	8.188
1985-10-31	8.0625
1985-11-30	8.1875
1985-12-31	8
1986-01-31	8.0625
1986-02-28	7.875
1986-03-31	7.4375
1986-04-30	6.875
1986-05-31	7.125
1986-06-30	6.875
1986-07-31	6.5
1986-08-31	5.8125
1986-09-30	6.125
1986-10-31	5.9375
1986-11-30	6.125
1986-12-31	6.375
1987-01-31	6.25
1987-02-28	6.4375
1987-03-31	6.626
1987-04-30	7.125
1987-05-31	7.375
1987-06-30	7.1875
1987-07-31	7
1987-08-31	7.1875
1987-09-30	8.375
1987-10-31	7.75
1987-11-30	7.938
1987-12-31	7.438
1988-01-31	6.875
1988-02-29	6.813
1988-03-31	6.875
1988-04-30	7.3125
1988-05-31	7.75
1988-06-30	7.938
1988-07-31	8.375
1988-08-31	8.563
1988-09-30	8.688
1988-10-31	8.625
1988-11-30	9.375
1988-12-31	9.313
1989-01-31	9.375
1989-02-28	10.313
1989-03-31	10.313
1989-04-30	9.938
1989-05-31	9.5625
1989-06-30	9.375
1989-07-31	8.5625
1989-08-31	9
1989-09-30	9.1875
1989-10-31	8.6875
1989-11-30	8.5
1989-12-31	8.375
1990-01-31	8.375
1990-02-28	8.375
1990-03-31	8.5
1990-04-30	8.6875
1990-05-31	8.375
1990-06-30	8.375
1990-07-31	7.9375
1990-08-31	8.0625
1990-09-30	8.3125
1990-10-31	8.0625
1990-11-30	8.375
1990-12-31	7.5625
1991-01-31	7.0625
1991-02-28	6.875
1991-03-31	6.375
1991-04-30	6.0625
1991-05-31	6.0625
1991-06-30	6.1875
1991-07-31	6.0625
1991-08-31	5.6875
1991-09-30	5.625
1991-10-31	5.25
1991-11-30	5
1991-12-31	4.25
1992-01-31	4.1875
1992-02-29	4.25
1992-03-31	4.375
1992-04-30	4.0625
1992-05-31	4.0625
1992-06-30	3.875
1992-07-31	3.4375
1992-08-31	3.5
1992-09-30	3.25
1992-10-31	3.5625
1992-11-30	4
1992-12-31	3.4375
1993-01-31	3.3125
1993-02-28	3.1875
1993-03-31	3.25
1993-04-30	3.1875
1993-05-31	3.375
1993-06-30	3.3125
1993-07-31	3.3125
1993-08-31	3.25
1993-09-30	3.375
1993-10-31	3.4375
1993-11-30	3.5
1993-12-31	3.375
1994-01-31	3.25
1994-02-28	3.75
1994-03-31	3.9375
1994-04-30	4.3125
1994-05-31	4.625
1994-06-30	4.875
1994-07-31	4.8125
1994-08-31	5
1994-09-30	5.5
1994-10-31	5.625
1994-11-30	6.1875
1994-12-31	6.5
1995-01-31	6.313
1995-02-28	6.25
1995-03-31	6.25
1995-04-30	6.1875
1995-05-31	6.0625
1995-06-30	6
1995-07-31	5.8125
1995-08-31	5.875
1995-09-30	5.88
1995-10-31	5.94
1995-11-30	5.88
1995-12-31	5.63
1996-01-31	5.31
1996-02-29	5.25
1996-03-31	5.63
1996-04-30	5.5
1996-05-31	5.46
1996-06-30	5.52
1996-07-31	5.6
1996-08-31	5.56
1996-09-30	5.58
1996-10-31	5.48
1996-11-30	5.51
1996-12-31	5.56
1997-01-31	5.53
1997-02-28	5.53
1997-03-31	5.78
1997-04-30	5.75
1997-05-31	5.8
1997-06-30	5.78
1997-07-31	5.71
1997-08-31	5.71
1997-09-30	5.71
1997-10-31	5.73
1997-11-30	5.9
1997-12-31	5.75
1998-01-31	5.62
1998-02-28	5.65
1998-03-31	5.69
1998-04-30	5.7
1998-05-31	5.65
1998-06-30	5.65
1998-07-31	5.62
1998-08-31	5.62
1998-09-30	5.28
1998-10-31	5.21
1998-11-30	5.28
1998-12-31	5.06
1999-01-31	4.96
1999-02-28	5.02
1999-03-31	4.93
1999-04-30	4.99
1999-05-31	5.03
1999-06-30	5.38
1999-07-31	5.38
1999-08-31	5.52
1999-09-30	6
1999-10-31	6.16
1999-11-30	6.14
1999-12-31	6.03
2000-01-31	6.1
2000-02-29	6.11
2000-03-31	6.32
2000-04-30	6.5
2000-05-31	6.88
2000-06-30	6.79
2000-07-31	6.76
2000-08-31	6.67
2000-09-30	6.77
2000-10-31	6.77
2000-11-30	6.67
2000-12-31	6.41
2001-01-31	5.38
2001-02-28	5.07
2001-03-31	4.92
2001-04-30	4.3
2001-05-31	3.98
2001-06-30	3.85
2001-07-31	3.66
2001-08-31	3.49
2001-09-30	2.57
2001-10-31	2.21
2001-11-30	2.03
2001-12-31	1.86
2002-01-31	1.9
2002-02-28	1.91
2002-03-31	2.05
2002-04-30	1.91
2002-05-31	1.87
2002-06-30	1.88
2002-07-31	1.8
2002-08-31	1.85
2002-09-30	1.79
2002-10-31	1.69
2002-11-30	1.47
2002-12-31	1.37
2003-01-31	1.34
2003-02-28	1.32
2003-03-31	1.3
2003-04-30	1.31
2003-05-31	1.27
2003-06-30	1.13
2003-07-31	1.11
2003-08-31	1.15
2003-09-30	1.17
2003-10-31	1.17
2003-11-30	1.16
2003-12-31	1.14
2004-01-31	1.13
2004-02-29	1.11
2004-03-31	1.1
2004-04-30	1.16
2004-05-31	1.29
2004-06-30	1.6
2004-07-31	1.68
2004-08-31	1.82
2004-09-30	1.99
2004-10-31	2.18
2004-11-30	2.43
2004-12-31	2.58
2005-01-31	2.77
2005-02-28	2.94
2005-03-31	3.07
2005-04-30	3.22
2005-05-31	3.35
2005-06-30	3.52
2005-07-31	3.68
2005-08-31	3.88
2005-09-30	4.09
2005-10-31	4.28
2005-11-30	4.45
2005-12-31	4.54
2006-01-31	4.7
2006-02-28	4.85
2006-03-31	5.03
2006-04-30	5.12
2006-05-31	5.26
2006-06-30	5.48
2006-07-31	5.47
2006-08-31	5.41
2006-09-30	5.35
2006-10-31	5.39
2006-11-30	5.37
2006-12-31	5.38
2007-01-31	5.37
2007-02-28	5.34
2007-03-31	5.35
2007-04-30	5.37
2007-05-31	5.38
2007-06-30	5.36
2007-07-31	5.36
2007-08-31	5.66
2007-09-30	5.37
2007-10-31	4.89
2007-11-30	5.3
2007-12-31	4.82
2008-01-31	3.12
2008-02-29	2.99
2008-03-31	3.07
2008-04-30	3.13
2008-05-31	3.05
2008-06-30	3.04
2008-07-31	2.89
2008-08-31	3.06
2008-09-30	6.32
2008-10-31	2.9
2008-11-30	3.91
2008-12-31	1.66
2009-01-31	1.8
2009-02-28	1.73
2009-03-31	1.19
2009-04-30	1.5
2009-05-31	0.97
2009-06-30	1.05
2009-07-31	0.77
2009-08-31	0.46
2009-09-30	0.68
2009-10-31	0.61
2009-11-30	0.33
2009-12-31	0.53
2010-01-31	0.51
2010-02-28	0.29
2010-03-31	0.4
2010-04-30	0.71
2010-05-31	1.02
2010-06-30	1.03
2010-07-31	0.84
2010-08-31	0.29
2010-09-30	0.51
2010-10-31	0.51
2010-11-30	0.42
2010-12-31	0.48
2011-01-31	0.44
2011-02-28	0.3
2011-03-31	0.65
2011-04-30	0.43
2011-05-31	0.46
2011-06-30	0.31
2011-07-31	0.6
2011-08-31	0.35
2011-09-30	0.4
2011-10-31	0.64
2011-11-30	0.45
2011-12-31	0.78
2012-01-31	0.41
2012-02-29	0.42
2012-03-31	0.4
2012-04-30	0.31
2012-05-31	0.66
2012-06-30	0.64
2012-07-31	0.61
2012-08-31	0.32
2012-09-30	0.3
2012-10-31	0.55
2012-11-30	0.3
2012-12-31	0.48
2013-01-31	0.42
2013-02-28	0.47
2013-03-31	0.48
2013-04-30	0.44
2013-05-31	0.41
2013-06-30	0.37
2013-07-31	0.36
2013-08-31	0.35
2013-09-30	0.33
2013-10-31	0.28
2013-11-30	0.28
2013-12-31	0.4
2014-01-31	0.3
2014-02-28	0.29
2014-03-31	0.29
2014-04-30	0.28
2014-05-31	0.33
2014-06-30	0.34
2014-07-31	0.33
2014-08-31	0.4
2014-09-30	0.33
2014-10-31	0.32
2014-11-30	0.24
2014-12-31	0.5
2015-01-31	0.41
2015-02-28	0.48
2015-03-31	0.52
2015-04-30	0.49
2015-05-31	0.33
2015-06-30	0.5
2015-07-31	0.5
2015-08-31	0.53
2015-09-30	0.58
2015-10-31	0.65
2015-11-30	0.95
2015-12-31	0.81
2016-01-31	0.81
2016-02-29	0.89
2016-03-31	0.88
2016-04-30	0.87
2016-05-31	0.69
2016-06-30	1.16
2016-07-31	0.76
2016-08-31	0.87
2016-09-30	0.9
2016-10-31	1.13
2016-11-30	0.97
2016-12-31	1.01
2017-01-31	1.07
2017-02-28	1.06
2017-03-31	1.4
2017-04-30	1.24
2017-05-31	1.21
2017-06-30	1.45
2017-07-31	1.31
2017-08-31	1.47
2017-09-30	1.48
2017-10-31	1.42
2017-11-30	1.65
2017-12-31	1.86
2018-01-31	2.07
2018-02-28	2.18
2018-03-31	2.48
2018-04-30	2.53
2018-05-31	2.48
2018-06-30	2.49
2018-07-31	2.5
2018-08-31	2.49
2018-09-30	2.55
2018-10-31	2.68
2018-11-30	2.87
2018-12-31	2.97
2019-01-31	2.9
2019-02-28	2.72
2019-03-31	2.7
2019-04-30	2.69
2019-05-31	2.61
2019-06-30	2.41
2019-07-31	2.37
2019-08-31	2.23
2019-09-30	2.22
2019-10-31	2.01
2019-11-30	2.01
2019-12-31	2.02
2020-01-31	1.84
2020-02-29	1.53