Month	Percent
1990-02-01	0.10
1990-03-01	0.10
1990-04-01	0.10
1990-05-01	0.20
1990-06-01	0.20
1990-07-01	0.40
1990-08-01	0.50
1990-09-01	0.80
1990-10-01	1.10
1990-11-01	1.30
1990-12-01	1.60
1991-01-01	2.40
1991-02-01	3.00
1991-03-01	3.70
1991-04-01	4.60
1991-05-01	5.40
1991-06-01	6.30
1991-07-01	7.70
1991-08-01	8.70
1991-09-01	9.60
1991-10-01	10.30
1991-11-01	11.10
1991-12-01	11.80
1992-01-01	12.70
1992-02-01	12.70
1992-03-01	12.30
1992-04-01	11.80
1992-05-01	11.30
1992-06-01	11.30
1992-07-01	11.10
1992-08-01	10.90
1992-09-01	10.60
1992-10-01	10.40
1992-11-01	10.30
1992-12-01	10.40
1993-01-01	11.20
1993-02-01	11.80
1993-03-01	12.00
1993-04-01	12.00
1993-05-01	12.00
1993-06-01	12.50
1993-07-01	13.30
1993-08-01	13.50
1993-09-01	13.70
1993-10-01	13.80
1993-11-01	14.00
1993-12-01	14.40
1994-01-01	15.20
1994-02-01	15.00
1994-03-01	14.80
1994-04-01	14.40
1994-05-01	14.10
1994-06-01	14.40
1994-07-01	14.80
1994-08-01	14.60
1994-09-01	14.50
1994-10-01	14.40
1994-11-01	14.50
1994-12-01	14.80
1995-01-01	15.20
1995-02-01	15.10
1995-03-01	14.60
1995-04-01	13.90
1995-05-01	13.30
1995-06-01	13.30
1995-07-01	13.50
1995-08-01	13.30
1995-09-01	13.20
1995-10-01	12.80
1995-11-01	12.80
1995-12-01	13.10
1996-01-01	13.70
1996-02-01	13.70
1996-03-01	13.30
1996-04-01	12.50
1996-05-01	11.90
1996-06-01	12.10
1996-07-01	12.50
1996-08-01	12.30
1996-09-01	12.20
1996-10-01	12.00
1996-11-01	12.20
1996-12-01	12.80
1997-01-01	13.60
1997-02-01	13.70
1997-03-01	13.40
1997-04-01	13.00
1997-05-01	12.30
1997-06-01	12.30
1997-07-01	12.80
1997-08-01	12.80
1997-09-01	13.00
1997-10-01	12.90
1997-11-01	12.60
1997-12-01	12.50
1998-01-01	13.40
1998-02-01	13.60
1998-03-01	13.40
1998-04-01	13.20
1998-05-01	12.90
1998-06-01	13.50
1998-07-01	14.10
1998-08-01	13.80
1998-09-01	13.80
1998-10-01	13.90
1998-11-01	14.50
1998-12-01	15.60
1999-01-01	16.30
1999-02-01	16.50
1999-03-01	16.70
1999-04-01	16.40
1999-05-01	16.50
1999-06-01	17.70
1999-07-01	18.30
1999-08-01	18.20
1999-09-01	17.80
1999-10-01	17.70
1999-11-01	18.30
1999-12-01	19.20
2000-01-01	19.50
2000-02-01	19.50
2000-03-01	19.30
2000-04-01	18.80
2000-05-01	18.60
2000-06-01	19.10
2000-07-01	19.40
2000-08-01	17.40
2000-09-01	16.60
2000-10-01	16.10
2000-11-01	16.70
2000-12-01	17.90
2001-01-01	19.80
2001-02-01	19.70
2001-03-01	19.20
2001-04-01	18.30
2001-05-01	17.50
2001-06-01	17.80
2001-07-01	18.00
2001-08-01	17.80
2001-09-01	17.40
2001-10-01	17.30
2001-11-01	17.70
2001-12-01	18.60
2002-01-01	19.70
2002-02-01	19.60
2002-03-01	19.10
2002-04-01	18.10
2002-05-01	17.70
2002-06-01	17.60
2002-07-01	17.60
2002-08-01	17.20
2002-09-01	16.60
2002-10-01	16.40
2002-11-01	16.80
2002-12-01	17.40
2003-01-01	17.70
2003-02-01	17.10
2003-03-01	16.50
2003-04-01	15.40
2003-05-01	14.80
2003-06-01	14.60
2003-07-01	14.50
2003-08-01	14.30
2003-09-01	13.90
2003-10-01	13.80
2003-11-01	14.20
2003-12-01	15.60
2004-01-01	16.60
2004-02-01	16.50
2004-03-01	16.00
2004-04-01	15.30
2004-05-01	14.50
2004-06-01	13.90
2004-07-01	13.70
2004-08-01	13.20
2004-09-01	13.10
2004-10-01	12.70
2004-11-01	12.60
2004-12-01	13.10
2005-01-01	13.40
2005-02-01	13.10
2005-03-01	12.70
2005-04-01	11.90
2005-05-01	11.30
2005-06-01	11.10
2005-07-01	11.00
2005-08-01	10.90
2005-09-01	11.20
2005-10-01	10.90
2005-11-01	10.90
2005-12-01	11.40
2006-01-01	11.80
2006-02-01	11.70
2006-03-01	11.40
2006-04-01	11.00
2006-05-01	10.60
2006-06-01	10.40
2006-07-01	10.20
2006-08-01	9.90
2006-09-01	9.80
2006-10-01	9.30
2006-11-01	9.10
2006-12-01	9.40
2007-01-01	9.50
2007-02-01	9.20
2007-03-01	8.90
2007-04-01	8.50
2007-05-01	8.30
2007-06-01	8.30
2007-07-01	8.30
2007-08-01	8.20
2007-09-01	8.30
2007-10-01	7.90
2007-11-01	7.80
2007-12-01	8.00
2008-01-01	8.10
2008-02-01	9.09
2008-03-01	8.80
2008-04-01	8.56
2008-05-01	8.52
2008-06-01	8.54
2008-07-01	8.62
2008-08-01	8.52
2008-09-01	8.76
2008-10-01	8.75
2008-11-01	9.02
2008-12-01	9.53
2009-01-01	10.17
2009-02-01	10.93
2009-03-01	11.76
2009-04-01	12.29
2009-05-01	12.71
2009-06-01	13.16
2009-07-01	13.43
2009-08-01	13.40
2009-09-01	13.89
2009-10-01	13.92
2009-11-01	14.09
2009-12-01	14.32
2010-01-01	14.57
2010-02-01	14.74
2010-03-01	14.65
2010-04-01	14.26
2010-05-01	13.96
2010-06-01	14.02
2010-07-01	13.98
2010-08-01	13.79
2010-09-01	14.03
2010-10-01	13.93
2010-11-01	13.93
2010-12-01	14.19
2011-01-01	14.68
2011-02-01	14.82
2011-03-01	14.71
2011-04-01	14.41
2011-05-01	14.25
2011-06-01	14.36
2011-07-01	14.48
2011-08-01	14.40
2011-09-01	14.64
2011-10-01	14.62
2011-11-01	14.74
2011-12-01	14.99
2012-01-01	15.13
2012-02-01	15.24
2012-03-01	15.11
2012-04-01	14.73
2012-05-01	14.52
2012-06-01	14.64
2012-07-01	14.77
2012-08-01	14.74
2012-09-01	14.90
2012-10-01	15.19
2012-11-01	15.52
2012-12-01	15.76
2013-01-01	16.13
2013-02-01	16.20
2013-03-01	15.98
2013-04-01	15.64
2013-05-01	15.39
2013-06-01	15.49
2013-07-01	15.22
2013-08-01	14.90
2013-09-01	15.06
2013-10-01	14.91
2013-11-01	14.81
2013-12-01	14.78
2014-01-01	14.90
2014-02-01	14.89
2014-03-01	14.72
2014-04-01	14.46
2014-05-01	14.27
2014-06-01	14.26
2014-07-01	14.23
2014-08-01	14.11
2014-09-01	14.01
2014-10-01	13.93
2014-11-01	13.86
2014-12-01	13.85
2015-01-01	14.08
2015-02-01	13.95
2015-03-01	13.70
2015-04-01	13.35
2015-05-01	13.06
2015-06-01	13.12
2015-07-01	13.04
2015-08-01	12.86
2015-09-01	12.95
2015-10-01	12.76
2015-11-01	12.50
2015-12-01	12.40
2016-01-01	12.18
2016-02-01	12.00
2016-03-01	11.69
2016-04-01	10.14
2016-05-01	11.13
2016-06-01	11.02
2016-07-01	10.96
2016-08-01	10.85
2016-09-01	10.83
2016-10-01	10.50
2016-11-01	10.24
2016-12-01	10.16
2017-01-01	10.05
2017-02-01	9.80
2017-03-01	9.45
2017-04-01	9.13
2017-05-01	8.69
2017-06-01	8.14
2017-07-01	7.91
2017-08-01	7.70
2017-09-01	7.59
2017-10-01	7.35
2017-11-01	7.19
2017-12-01	7.18
2018-01-01	7.12
2018-02-01	6.97
2018-03-01	6.77
2018-04-01	6.65
2018-05-01	6.58
2018-06-01	6.58
2018-07-01	6.60
2018-08-01	6.53
2018-09-01	6.52