Month	Percent
1991-01-01	13.43
1991-02-01	14.22
1991-03-01	14.52
1991-04-01	15.04
1991-05-01	15.75
1991-06-01	19.22
1991-07-01	18.41
1991-08-01	18.99
1991-09-01	20.65
1991-10-01	18.30
1991-11-01	18.00
1991-12-01	17.18
1992-01-01	14.18
1992-02-01	14.31
1992-03-01	14.90
1992-04-01	14.90
1992-05-01	14.90
1992-06-01	14.92
1992-07-01	14.96
1992-08-01	14.98
1992-09-01	14.91
1992-10-01	11.68
1992-11-01	13.48
1992-12-01	13.76
1993-01-01	12.40
1993-02-01	11.06
1993-03-01	10.95
1993-04-01	10.66
1993-05-01	11.17
1993-06-01	13.19
1993-07-01	14.44
1993-08-01	13.64
1993-09-01	12.57
1993-10-01	12.09
1993-11-01	11.45
1993-12-01	11.65
1994-01-01	10.54
1994-02-01	11.45
1994-03-01	12.04
1994-04-01	11.68
1994-05-01	11.81
1994-06-01	12.78
1994-07-01	12.69
1994-08-01	15.35
1994-09-01	12.69
1994-10-01	11.57
1994-11-01	12.94
1994-12-01	14.54
1995-01-01	15.53
1995-02-01	15.25
1995-03-01	12.21
1995-04-01	12.92
1995-05-01	13.76
1995-06-01	12.84
1995-07-01	11.26
1995-08-01	11.66
1995-09-01	11.41
1995-10-01	11.15
1995-11-01	11.42
1995-12-01	11.18
1996-01-01	10.52
1996-02-01	10.75
1996-03-01	10.33
1996-04-01	9.50
1996-05-01	11.56
1996-06-01	12.44
1996-07-01	13.03
1996-08-01	15.52
1996-09-01	14.11
1996-10-01	14.64
1996-11-01	14.46
1996-12-01	12.50
1997-01-01	11.32
1997-02-01	11.51
1997-03-01	12.93
1997-04-01	12.96
1997-05-01	12.40
1997-06-01	11.15
1997-07-01	11.39
1997-08-01	12.37
1997-09-01	13.11
1997-10-01	13.52
1997-11-01	14.07
1997-12-01	20.66
1998-01-01	25.33
1998-02-01	23.52
1998-03-01	22.43
1998-04-01	21.39
1998-05-01	18.77
1998-06-01	16.43
1998-07-01	12.83
1998-08-01	9.53
1998-09-01	8.48
1998-10-01	7.39
1998-11-01	7.29
1998-12-01	7.04
1999-01-01	6.37
1999-02-01	5.65
1999-03-01	5.02
1999-04-01	4.81
1999-05-01	4.78
1999-06-01	4.79
1999-07-01	4.79
1999-08-01	4.74
1999-09-01	4.74
1999-10-01	4.77
1999-11-01	4.76
1999-12-01	4.79
2000-01-01	4.78
2000-02-01	5.02
2000-03-01	5.10
2000-04-01	5.10
2000-05-01	5.12
2000-06-01	5.12
2000-07-01	5.14
2000-08-01	5.14
2000-09-01	5.13
2000-10-01	5.33
2000-11-01	5.35
2000-12-01	5.37
2001-01-01	5.32
2001-02-01	5.15
2001-03-01	5.05
2001-04-01	5.03
2001-05-01	5.03
2001-06-01	5.03
2001-07-01	4.81
2001-08-01	4.61
2001-09-01	4.33
2001-10-01	4.03
2001-11-01	4.03
2001-12-01	4.01
2002-01-01	3.98
2002-02-01	4.01
2002-03-01	4.01
2002-04-01	4.01
2002-05-01	4.25
2002-06-01	4.30
2002-07-01	4.28
2002-08-01	4.29
2002-09-01	4.30
2002-10-01	4.30
2002-11-01	4.30
2002-12-01	4.31
2003-01-01	4.28
2003-02-01	4.30
2003-03-01	4.24
2003-04-01	4.24
2003-05-01	4.06
2003-06-01	4.01
2003-07-01	3.82
2003-08-01	3.74
2003-09-01	3.74
2003-10-01	3.74
2003-11-01	3.77
2003-12-01	3.77
2004-01-01	3.78
2004-02-01	3.75
2004-03-01	3.75
2004-04-01	3.75
2004-05-01	3.76
2004-06-01	3.76
2004-07-01	3.76
2004-08-01	3.60
2004-09-01	3.52
2004-10-01	3.58
2004-11-01	3.34
2004-12-01	3.27
2005-01-01	3.26
2005-02-01	3.26
2005-03-01	3.24
2005-04-01	3.25
2005-05-01	3.29
2005-06-01	3.27
2005-07-01	3.24
2005-08-01	3.24
2005-09-01	3.24
2005-10-01	3.45
2005-11-01	3.49
2005-12-01	3.70
2006-01-01	3.74
2006-02-01	3.92
2006-03-01	3.97
2006-04-01	3.97
2006-05-01	3.96
2006-06-01	4.17
2006-07-01	4.21
2006-08-01	4.42
2006-09-01	4.47
2006-10-01	4.48
2006-11-01	4.47
2006-12-01	4.50
2007-01-01	4.63
2007-02-01	4.60
2007-03-01	4.60
2007-04-01	4.69
2007-05-01	4.61
2007-06-01	4.54
2007-07-01	4.67
2007-08-01	4.92
2007-09-01	4.98
2007-10-01	5.00
2007-11-01	5.00
2007-12-01	4.99
2008-01-01	4.99
2008-02-01	4.97
2008-03-01	4.97
2008-04-01	4.99
2008-05-01	4.97
2008-06-01	4.95
2008-07-01	4.98
2008-08-01	5.22
2008-09-01	5.22
2008-10-01	4.88
2008-11-01	4.00
2008-12-01	3.27
2009-01-01	2.43
2009-02-01	2.06
2009-03-01	1.77
2009-04-01	1.80
2009-05-01	1.91
2009-06-01	1.93
2009-07-01	1.93
2009-08-01	1.98
2009-09-01	1.99
2009-10-01	1.99
2009-11-01	2.00
2009-12-01	2.00
2010-01-01	2.00
2010-02-01	2.00
2010-03-01	2.01
2010-04-01	2.00
2010-05-01	2.01
2010-06-01	2.00
2010-07-01	2.21
2010-08-01	2.27
2010-09-01	2.27
2010-10-01	2.26
2010-11-01	2.37
2010-12-01	2.50
2011-01-01	2.66
2011-02-01	2.75
2011-03-01	2.92
2011-04-01	3.01
2011-05-01	3.02
2011-06-01	3.21
2011-07-01	3.26
2011-08-01	3.25
2011-09-01	3.25
2011-10-01	3.24
2011-11-01	3.26
2011-12-01	3.26
2012-01-01	3.26
2012-02-01	3.25
2012-03-01	3.25
2012-04-01	3.25
2012-05-01	3.26
2012-06-01	3.26
2012-07-01	3.08
2012-08-01	3.00
2012-09-01	2.99
2012-10-01	2.80
2012-11-01	2.75
2012-12-01	2.75
2013-01-01	2.76
2013-02-01	2.75
2013-03-01	2.74
2013-04-01	2.75
2013-05-01	2.55
2013-06-01	2.49
2013-07-01	2.48
2013-08-01	2.50
2013-09-01	2.50
2013-10-01	2.50
2013-11-01	2.50
2013-12-01	2.50
2014-01-01	2.50
2014-02-01	2.49
2014-03-01	2.48
2014-04-01	2.49
2014-05-01	2.49
2014-06-01	2.48
2014-07-01	2.49
2014-08-01	2.34
2014-09-01	2.23
2014-10-01	2.06
2014-11-01	1.98
2014-12-01	1.99
2015-01-01	1.99
2015-02-01	1.99
2015-03-01	1.82
2015-04-01	1.73
2015-05-01	1.74
2015-06-01	1.57
2015-07-01	1.48
2015-08-01	1.49
2015-09-01	1.48
2015-10-01	1.48
2015-11-01	1.49
2015-12-01	1.48
2016-01-01	1.49
2016-02-01	1.49
2016-03-01	1.49
2016-04-01	1.49
2016-05-01	1.49
2016-06-01	1.28
2016-07-01	1.23
2016-08-01	1.23
2016-09-01	1.24
2016-10-01	1.23
2016-11-01	1.23
2016-12-01	1.22
2017-01-01	1.24
2017-02-01	1.23
2017-03-01	1.23
2017-04-01	1.23
2017-05-01	1.23
2017-06-01	1.24
2017-07-01	1.24
2017-08-01	1.23
2017-09-01	1.25
2017-10-01	1.24
2017-11-01	1.26
2017-12-01	1.51
2018-01-01	1.49
2018-02-01	1.49
2018-03-01	1.49
2018-04-01	1.47
2018-05-01	1.50
2018-06-01	1.49
2018-07-01	1.49
2018-08-01	1.50
2018-09-01	1.54
2018-10-01	1.52