Month	Percent
1982-01-01	11.20
1982-02-01	12.40
1982-03-01	14.20
1982-04-01	28.50
1982-05-01	21.70
1982-06-01	12.50
1982-07-01	20.40
1982-08-01	12.40
1982-09-01	11.10
1982-10-01	17.90
1982-11-01	13.50
1982-12-01	11.60
1983-01-01	13.11
1983-02-01	11.93
1983-03-01	12.66
1983-04-01	12.92
1983-05-01	14.77
1983-06-01	11.57
1983-07-01	11.91
1983-08-01	13.16
1983-09-01	11.54
1983-10-01	12.41
1983-11-01	12.58
1983-12-01	12.74
1984-01-01	12.88
1984-02-01	11.96
1984-03-01	13.47
1984-04-01	13.09
1984-05-01	13.19
1984-06-01	12.04
1984-07-01	12.00
1984-08-01	12.59
1984-09-01	12.09
1984-10-01	12.95
1984-11-01	13.09
1984-12-01	12.36
1985-01-01	10.96
1985-02-01	12.78
1985-03-01	11.34
1985-04-01	13.33
1985-05-01	12.81
1985-06-01	12.77
1985-07-01	11.75
1985-08-01	12.12
1985-09-01	11.90
1985-10-01	11.30
1985-11-01	11.81
1985-12-01	12.17
1986-01-01	13.37
1986-02-01	13.50
1986-03-01	13.49
1986-04-01	14.01
1986-05-01	21.78
1986-06-01	14.40
1986-07-01	14.48
1986-08-01	14.33
1986-09-01	14.37
1986-10-01	14.51
1986-11-01	14.33
1986-12-01	17.97
1987-01-01	15.75
1987-02-01	14.60
1987-03-01	14.20
1987-04-01	14.35
1987-05-01	14.20
1987-06-01	14.27
1987-07-01	14.13
1987-08-01	14.03
1987-09-01	14.04
1987-10-01	13.73
1987-11-01	13.97
1987-12-01	14.21
1988-01-01	13.85
1988-02-01	13.89
1988-03-01	13.93
1988-04-01	14.02
1988-05-01	13.56
1988-06-01	13.14
1988-07-01	12.98
1988-08-01	12.57
1988-09-01	12.81
1988-10-01	12.74
1988-11-01	13.12
1988-12-01	12.09
1989-01-01	11.68
1989-02-01	11.41
1989-03-01	11.39
1989-04-01	11.46
1989-05-01	11.05
1989-06-01	10.71
1989-07-01	11.19
1989-08-01	10.61
1989-09-01	11.15
1989-10-01	11.18
1989-11-01	11.39
1989-12-01	12.42
1990-01-01	11.52
1990-02-01	11.28
1990-03-01	12.62
1990-04-01	11.97
1990-05-01	11.56
1990-06-01	11.49
1990-07-01	11.35
1990-08-01	10.21
1990-09-01	10.89
1990-10-01	11.44
1990-11-01	11.44
1990-12-01	11.53
1991-01-01	11.26
1991-02-01	10.95
1991-03-01	10.51
1991-04-01	10.37
1991-05-01	10.74
1991-06-01	11.63
1991-07-01	10.27
1991-08-01	9.40
1991-09-01	10.59
1991-10-01	10.63
1991-11-01	9.77
1991-12-01	11.00
1992-01-01	11.29
1992-02-01	10.35
1992-03-01	10.12
1992-04-01	11.08
1992-05-01	10.61
1992-06-01	10.22
1992-07-01	10.36
1992-08-01	11.08
1992-09-01	31.72
1992-10-01	15.32
1992-11-01	10.84
1992-12-01	22.94
1993-01-01	11.49
1993-02-01	9.73
1993-03-01	8.82
1993-04-01	8.87
1993-05-01	8.21
1993-06-01	7.40
1993-07-01	6.65
1993-08-01	6.53
1993-09-01	6.29
1993-10-01	6.55
1993-11-01	5.47
1993-12-01	6.42
1994-01-01	5.36
1994-02-01	5.15
1994-03-01	5.37
1994-04-01	5.47
1994-05-01	5.54
1994-06-01	4.98
1994-07-01	5.24
1994-08-01	5.19
1994-09-01	5.62
1994-10-01	5.81
1994-11-01	6.16
1994-12-01	6.58
1995-01-01	5.33
1995-02-01	5.02
1995-03-01	4.99
1995-04-01	5.66
1995-05-01	6.35
1995-06-01	5.96
1995-07-01	5.47
1995-08-01	5.21
1995-09-01	5.60
1995-10-01	5.51
1995-11-01	5.37
1995-12-01	6.65
1996-01-01	6.49
1996-02-01	5.48
1996-03-01	5.16
1996-04-01	5.17
1996-05-01	5.08
1996-06-01	4.98
1996-07-01	4.86
1996-08-01	4.91
1996-09-01	4.95
1996-10-01	5.03
1996-11-01	4.41
1996-12-01	4.15
1997-01-01	3.74
1997-02-01	3.67
1997-03-01	3.48
1997-04-01	3.51
1997-05-01	3.54
1997-06-01	3.50
1997-07-01	3.76
1997-08-01	3.75
1997-09-01	3.70
1997-10-01	3.82
1997-11-01	3.75
1997-12-01	3.69
1998-01-01	3.85
1998-02-01	3.81
1998-03-01	4.01
1998-04-01	3.98
1998-05-01	4.20
1998-06-01	4.65
1998-07-01	5.33
1998-08-01	6.41
1998-09-01	8.23
1998-10-01	8.32
1998-11-01	8.43
1998-12-01	8.83
1999-01-01	8.80
1999-02-01	8.16
1999-03-01	7.73
1999-04-01	7.64
1999-05-01	7.23
1999-06-01	6.99
1999-07-01	6.63
1999-08-01	6.56
1999-09-01	6.34
1999-10-01	5.92
1999-11-01	5.82
1999-12-01	5.92
2000-01-01	5.84
2000-02-01	5.92
2000-03-01	5.87
2000-04-01	6.11
2000-05-01	6.20
2000-06-01	6.45
2000-07-01	6.55
2000-08-01	6.87
2000-09-01	7.08
2000-10-01	7.39
2000-11-01	7.32
2000-12-01	7.62
2001-01-01	7.37
2001-02-01	7.31
2001-03-01	7.34
2001-04-01	7.73
2001-05-01	7.36
2001-06-01	7.37
2001-07-01	7.30
2001-08-01	7.16
2001-09-01	7.30
2001-10-01	7.31
2001-11-01	7.15
2001-12-01	7.11
2002-01-01	6.70
2002-02-01	6.76
2002-03-01	6.74
2002-04-01	6.83
2002-05-01	6.78
2002-06-01	6.85
2002-07-01	7.19
2002-08-01	7.23
2002-09-01	7.21
2002-10-01	7.25
2002-11-01	7.21
2002-12-01	7.01
2003-01-01	6.59
2003-02-01	6.19
2003-03-01	5.78
2003-04-01	5.78
2003-05-01	5.35
2003-06-01	5.07
2003-07-01	4.25
2003-08-01	3.71
2003-09-01	3.11
2003-10-01	3.02
2003-11-01	2.87
2003-12-01	2.84
2004-01-01	2.52
2004-02-01	2.34
2004-03-01	2.14
2004-04-01	2.16
2004-05-01	2.14
2004-06-01	2.19
2004-07-01	2.15
2004-08-01	2.14
2004-09-01	2.07
2004-10-01	2.11
2004-11-01	2.07
2004-12-01	2.06
2005-01-01	2.02
2005-02-01	2.01
2005-03-01	2.06
2005-04-01	2.13
2005-05-01	2.08
2005-06-01	2.11
2005-07-01	2.29
2005-08-01	2.24
2005-09-01	2.31
2005-10-01	2.42
2005-11-01	2.62
2005-12-01	2.63
2006-01-01	2.55
2006-02-01	2.53
2006-03-01	2.65
2006-04-01	3.01
2006-05-01	2.96
2006-06-01	3.15
2006-07-01	3.09
2006-08-01	3.21
2006-09-01	3.32
2006-10-01	3.42
2006-11-01	3.62
2006-12-01	3.78
2007-01-01	3.92
2007-02-01	4.13
2007-03-01	4.27
2007-04-01	4.37
2007-05-01	4.37
2007-06-01	4.60
2007-07-01	4.85
2007-08-01	4.99
2007-09-01	5.15
2007-10-01	5.48
2007-11-01	5.39
2007-12-01	5.54
2008-01-01	5.58
2008-02-01	5.70
2008-03-01	5.77
2008-04-01	5.97
2008-05-01	6.14
2008-06-01	5.99
2008-07-01	6.08
2008-08-01	6.11
2008-09-01	6.26
2008-10-01	6.72
2008-11-01	5.09
2008-12-01	4.76
2009-01-01	3.48
2009-02-01	3.03
2009-03-01	2.69
2009-04-01	2.52
2009-05-01	1.87
2009-06-01	1.75
2009-07-01	1.53
2009-08-01	1.51
2009-09-01	1.47
2009-10-01	1.54
2009-11-01	1.74
2009-12-01	1.83
2010-01-01	1.95
2010-02-01	1.98
2010-03-01	1.96
2010-04-01	2.02
2010-05-01	2.09
2010-06-01	2.28
2010-07-01	2.34
2010-08-01	2.31
2010-09-01	2.30
2010-10-01	2.26
2010-11-01	2.25
2010-12-01	2.08
2011-01-01	2.17
2011-02-01	2.22
2011-03-01	2.22
2011-04-01	2.24
2011-05-01	2.44
2011-06-01	2.56
2011-07-01	2.44
2011-08-01	2.42
2011-09-01	2.69
2011-10-01	2.24
2011-11-01	2.25
2011-12-01	1.98
2012-01-01	1.73
2012-02-01	1.73
2012-03-01	1.61
2012-04-01	1.48
2012-05-01	1.49
2012-06-01	1.56
2012-07-01	1.48
2012-08-01	1.49
2012-09-01	1.49
2012-10-01	1.49
2012-11-01	1.49
2012-12-01	1.54
2013-01-01	1.48
2013-02-01	1.49
2013-03-01	1.55
2013-04-01	1.50
2013-05-01	1.50
2013-06-01	1.48
2013-07-01	1.48
2013-08-01	1.48
2013-09-01	1.50
2013-10-01	1.48
2013-11-01	1.49
2013-12-01	1.55
2014-01-01	1.48
2014-02-01	1.49
2014-03-01	1.48
2014-04-01	1.49
2014-05-01	1.49
2014-06-01	1.49
2014-07-01	1.49
2014-08-01	1.49
2014-09-01	1.50
2014-10-01	1.49
2014-11-01	1.49
2014-12-01	1.35
2015-01-01	1.24
2015-02-01	1.24
2015-03-01	1.28
2015-04-01	1.24
2015-05-01	1.25
2015-06-01	1.15
2015-07-01	0.98
2015-08-01	0.99
2015-09-01	0.94
2015-10-01	0.74
2015-11-01	0.74
2015-12-01	0.81
2016-01-01	0.74
2016-02-01	0.74
2016-03-01	0.67
2016-04-01	0.49
2016-05-01	0.49
2016-06-01	0.49
2016-07-01	0.49
2016-08-01	0.50
2016-09-01	0.57
2016-10-01	0.49
2016-11-01	0.50
2016-12-01	0.51
2017-01-01	0.49
2017-02-01	0.49
2017-03-01	0.49
2017-04-01	0.49
2017-05-01	0.49
2017-06-01	0.49
2017-07-01	0.50
2017-08-01	0.49
2017-09-01	0.51
2017-10-01	0.49
2017-11-01	0.49
2017-12-01	0.49
2018-01-01	0.49
2018-02-01	0.49
2018-03-01	0.49
2018-04-01	0.50
2018-05-01	0.49
2018-06-01	0.50
2018-07-01	0.50
2018-08-01	0.49
2018-09-01	0.59
2018-10-01	0.74