Month	Percent
1986-12-01	10.99
1987-01-01	11.68
1987-02-01	11.47
1987-03-01	11.23
1987-04-01	11.16
1987-05-01	11.78
1987-06-01	11.78
1987-07-01	11.77
1987-08-01	11.97
1987-09-01	12.02
1987-10-01	12.00
1987-11-01	11.59
1987-12-01	11.71
1988-01-01	11.66
1988-02-01	11.29
1988-03-01	11.33
1988-04-01	11.39
1988-05-01	11.53
1988-06-01	11.29
1988-07-01	11.36
1988-08-01	11.56
1988-09-01	11.47
1988-10-01	11.36
1988-11-01	11.05
1988-12-01	10.93
1989-01-01	10.48
1989-02-01	10.52
1989-03-01	10.92
1989-04-01	11.04
1989-05-01	11.05
1989-06-01	11.12
1989-07-01	11.20
1989-08-01	11.01
1989-09-01	10.98
1989-10-01	11.17
1989-11-01	12.12
1989-12-01	12.55
1990-01-01	12.87
1990-02-01	13.70
1990-03-01	13.75
1990-04-01	13.64
1990-05-01	13.28
1990-06-01	12.89
1990-07-01	12.82
1990-08-01	13.26
1990-09-01	13.35
1990-10-01	13.25
1990-11-01	12.80
1990-12-01	12.30
1991-01-01	11.85
1991-02-01	11.15
1991-03-01	11.33
1991-04-01	11.34
1991-05-01	10.77
1991-06-01	10.60
1991-07-01	10.61
1991-08-01	10.62
1991-09-01	10.18
1991-10-01	10.00
1991-11-01	9.84
1991-12-01	10.00
1992-01-01	9.53
1992-02-01	9.43
1992-03-01	9.39
1992-04-01	9.50
1992-05-01	9.47
1992-06-01	9.59
1992-07-01	9.80
1992-08-01	10.60
1992-09-01	11.24
1992-10-01	11.06
1992-11-01	10.68
1992-12-01	9.91
1993-01-01	10.14
1993-02-01	9.80
1993-03-01	9.37
1993-04-01	9.41
1993-05-01	9.09
1993-06-01	8.68
1993-07-01	8.24
1993-08-01	7.63
1993-09-01	7.79
1993-10-01	7.56
1993-11-01	7.49
1993-12-01	7.27
1994-01-01	6.84
1994-02-01	6.94
1994-03-01	7.65
1994-04-01	8.40
1994-05-01	8.69
1994-06-01	9.78
1994-07-01	10.65
1994-08-01	11.20
1994-09-01	11.24
1994-10-01	10.95
1994-11-01	10.92
1994-12-01	10.68
1995-01-01	11.00
1995-02-01	10.71
1995-03-01	11.18
1995-04-01	11.42
1995-05-01	10.74
1995-06-01	10.58
1995-07-01	10.55
1995-08-01	10.22
1995-09-01	9.64
1995-10-01	9.30
1995-11-01	8.99
1995-12-01	8.60
1996-01-01	8.23
1996-02-01	8.75
1996-03-01	8.76
1996-04-01	8.33
1996-05-01	8.44
1996-06-01	8.34
1996-07-01	8.26
1996-08-01	8.11
1996-09-01	7.80
1996-10-01	7.19
1996-11-01	7.26
1996-12-01	6.85
1997-01-01	6.74
1997-02-01	6.68
1997-03-01	7.10
1997-04-01	7.24
1997-05-01	6.99
1997-06-01	6.77
1997-07-01	6.42
1997-08-01	6.50
1997-09-01	6.38
1997-10-01	6.22
1997-11-01	6.30
1997-12-01	6.03
1998-01-01	5.65
1998-02-01	5.53
1998-03-01	5.35
1998-04-01	5.21
1998-05-01	5.20
1998-06-01	4.97
1998-07-01	4.88
1998-08-01	4.80
1998-09-01	4.76
1998-10-01	4.72
1998-11-01	4.55
1998-12-01	4.25
1999-01-01	4.02
1999-02-01	4.18
1999-03-01	4.44
1999-04-01	4.24
1999-05-01	4.50
1999-06-01	4.87
1999-07-01	5.26
1999-08-01	5.49
1999-09-01	5.69
1999-10-01	5.92
1999-11-01	5.56
1999-12-01	5.59
2000-01-01	5.95
2000-02-01	5.90
2000-03-01	5.51
2000-04-01	5.42
2000-05-01	5.34
2000-06-01	5.13
2000-07-01	5.31
2000-08-01	5.31
2000-09-01	5.26
2000-10-01	5.23
2000-11-01	5.13
2000-12-01	4.92
2001-01-01	4.89
2001-02-01	4.86
2001-03-01	4.75
2001-04-01	4.93
2001-05-01	5.27
2001-06-01	5.38
2001-07-01	5.42
2001-08-01	5.16
2001-09-01	5.26
2001-10-01	5.17
2001-11-01	4.96
2001-12-01	5.24
2002-01-01	5.27
2002-02-01	5.36
2002-03-01	5.63
2002-04-01	5.69
2002-05-01	5.69
2002-06-01	5.52
2002-07-01	5.37
2002-08-01	5.13
2002-09-01	4.97
2002-10-01	5.07
2002-11-01	5.05
2002-12-01	4.89
2003-01-01	4.70
2003-02-01	4.47
2003-03-01	4.57
2003-04-01	4.72
2003-05-01	4.37
2003-06-01	4.20
2003-07-01	4.51
2003-08-01	4.70
2003-09-01	4.73
2003-10-01	4.85
2003-11-01	4.98
2003-12-01	4.86
2004-01-01	4.65
2004-02-01	4.55
2004-03-01	4.31
2004-04-01	4.55
2004-05-01	4.68
2004-06-01	4.72
2004-07-01	4.57
2004-08-01	4.42
2004-09-01	4.37
2004-10-01	4.25
2004-11-01	4.13
2004-12-01	3.90
2005-01-01	3.84
2005-02-01	3.76
2005-03-01	3.86
2005-04-01	3.58
2005-05-01	3.34
2005-06-01	3.11
2005-07-01	3.06
2005-08-01	3.14
2005-09-01	2.98
2005-10-01	3.17
2005-11-01	3.38
2005-12-01	3.37
2006-01-01	3.32
2006-02-01	3.42
2006-03-01	3.55
2006-04-01	3.84
2006-05-01	3.89
2006-06-01	3.93
2006-07-01	3.96
2006-08-01	3.84
2006-09-01	3.70
2006-10-01	3.73
2006-11-01	3.62
2006-12-01	3.65
2007-01-01	3.90
2007-02-01	3.93
2007-03-01	3.79
2007-04-01	4.04
2007-05-01	4.15
2007-06-01	4.44
2007-07-01	4.45
2007-08-01	4.25
2007-09-01	4.22
2007-10-01	4.31
2007-11-01	4.22
2007-12-01	4.31
2008-01-01	4.08
2008-02-01	4.02
2008-03-01	3.92
2008-04-01	4.06
2008-05-01	4.18
2008-06-01	4.43
2008-07-01	4.37
2008-08-01	4.11
2008-09-01	3.90
2008-10-01	3.57
2008-11-01	3.34
2008-12-01	2.67
2009-01-01	2.80
2009-02-01	2.93
2009-03-01	2.94
2009-04-01	3.18
2009-05-01	3.57
2009-06-01	3.62
2009-07-01	3.37
2009-08-01	3.45
2009-09-01	3.38
2009-10-01	3.25
2009-11-01	3.27
2009-12-01	3.24
2010-01-01	3.37
2010-02-01	3.28
2010-03-01	3.20
2010-04-01	3.14
2010-05-01	2.73
2010-06-01	2.61
2010-07-01	2.70
2010-08-01	2.45
2010-09-01	2.53
2010-10-01	2.64
2010-11-01	2.86
2010-12-01	3.21
2011-01-01	3.28
2011-02-01	3.41
2011-03-01	3.35
2011-04-01	3.30
2011-05-01	3.01
2011-06-01	2.89
2011-07-01	2.75
2011-08-01	2.17
2011-09-01	1.83
2011-10-01	1.90
2011-11-01	1.69
2011-12-01	1.68
2012-01-01	1.70
2012-02-01	1.89
2012-03-01	1.95
2012-04-01	1.82
2012-05-01	1.51
2012-06-01	1.45
2012-07-01	1.33
2012-08-01	1.44
2012-09-01	1.51
2012-10-01	1.54
2012-11-01	1.46
2012-12-01	1.51
2013-01-01	1.80
2013-02-01	2.00
2013-03-01	1.92
2013-04-01	1.66
2013-05-01	1.79
2013-06-01	2.05
2013-07-01	2.16
2013-08-01	2.34
2013-09-01	2.60
2013-10-01	2.44
2013-11-01	2.30
2013-12-01	2.39
2014-01-01	2.37
2014-02-01	2.23
2014-03-01	2.16
2014-04-01	2.06
2014-05-01	1.88
2014-06-01	1.80
2014-07-01	1.60
2014-08-01	1.58
2014-09-01	1.51
2014-10-01	1.30
2014-11-01	1.14
2014-12-01	1.01
2015-01-01	0.78
2015-02-01	0.62
2015-03-01	0.58
2015-04-01	0.34
2015-05-01	0.75
2015-06-01	0.99
2015-07-01	0.81
2015-08-01	0.66
2015-09-01	0.71
2015-10-01	0.66
2015-11-01	0.80
2015-12-01	0.93
2016-01-01	0.77
2016-02-01	0.77
2016-03-01	0.82
2016-04-01	0.81
2016-05-01	0.77
2016-06-01	0.52
2016-07-01	0.17
2016-08-01	0.10
2016-09-01	0.22
2016-10-01	0.24
2016-11-01	0.43
2016-12-01	0.61
2017-01-01	0.65
2017-02-01	0.66
2017-03-01	0.69
2017-04-01	0.57
2017-05-01	0.56
2017-06-01	0.46
2017-07-01	0.66
2017-08-01	0.63
2017-09-01	0.62
2017-10-01	0.88
2017-11-01	0.76
2017-12-01	0.72
2018-01-01	0.85
2018-02-01	0.91
2018-03-01	0.77
2018-04-01	0.71
2018-05-01	0.66
2018-06-01	0.55
2018-07-01	0.51
2018-08-01	0.52
2018-09-01	0.60
2018-10-01	0.67