Month	Percent
1990-01-01	13.20
1990-02-01	13.13
1990-03-01	13.13
1990-04-01	13.13
1990-05-01	13.20
1990-06-01	16.94
1990-07-01	17.74
1990-08-01	17.40
1990-09-01	17.63
1990-10-01	18.25
1990-11-01	18.36
1990-12-01	18.83
1991-01-01	19.25
1991-02-01	19.25
1991-03-01	23.55
1991-04-01	20.50
1991-05-01	19.01
1991-06-01	18.99
1991-07-01	18.73
1991-08-01	18.50
1991-09-01	18.50
1991-10-01	18.50
1991-11-01	18.50
1991-12-01	18.47
1992-01-01	18.00
1992-02-01	18.00
1992-03-01	17.99
1992-04-01	17.00
1992-05-01	17.00
1992-06-01	16.00
1992-07-01	16.00
1992-08-01	15.21
1992-09-01	14.66
1992-10-01	14.49
1992-11-01	14.00
1992-12-01	13.50
1993-01-01	13.50
1993-02-01	13.00
1993-03-01	12.50
1993-04-01	12.50
1993-05-01	11.83
1993-06-01	10.74
1993-07-01	8.75
1993-08-01	7.45
1993-09-01	9.11
1993-10-01	9.69
1993-11-01	9.52
1993-12-01	8.82
1994-01-01	8.83
1994-02-01	8.21
1994-03-01	8.45
1994-04-01	8.72
1994-05-01	9.66
1994-06-01	9.94
1994-07-01	10.70
1994-08-01	10.87
1994-09-01	11.55
1994-10-01	11.99
1994-11-01	12.17
1994-12-01	12.44
1995-01-01	13.05
1995-02-01	13.66
1995-03-01	14.13
1995-04-01	14.34
1995-05-01	14.74
1995-06-01	14.74
1995-07-01	14.67
1995-08-01	14.06
1995-09-01	14.02
1995-10-01	13.95
1995-11-01	13.99
1995-12-01	13.99
1996-01-01	13.99
1996-02-01	13.92
1996-03-01	13.99
1996-04-01	13.98
1996-05-01	13.99
1996-06-01	13.99
1996-07-01	13.92
1996-08-01	13.96
1996-09-01	13.96
1996-10-01	13.93
1996-11-01	13.40
1996-12-01	12.80
1997-01-01	12.06
1997-02-01	11.75
1997-03-01	11.07
1997-04-01	10.72
1997-05-01	10.63
1997-06-01	10.50
1997-07-01	10.87
1997-08-01	13.67
1997-09-01	22.00
1997-10-01	20.70
1997-11-01	20.00
1997-12-01	20.00
1998-01-01	20.00
1998-02-01	22.00
1998-03-01	27.75
1998-04-01	46.43
1998-05-01	58.00
1998-06-01	58.00
1998-07-01	70.81
1998-08-01	70.73
1998-09-01	68.76
1998-10-01	59.72
1998-11-01	51.25
1998-12-01	38.44
1999-01-01	36.43
1999-02-01	37.50
1999-03-01	37.84
1999-04-01	35.19
1999-05-01	28.73
1999-06-01	22.05
1999-07-01	15.01
1999-08-01	13.20
1999-09-01	13.02
1999-10-01	13.13
1999-11-01	13.10
1999-12-01	12.51
2000-01-01	11.48
2000-02-01	11.13
2000-03-01	11.03
2000-04-01	11.00
2000-05-01	11.08
2000-06-01	11.74
2000-07-01	13.53
2000-08-01	13.53
2000-09-01	13.62
2000-10-01	13.74
2000-11-01	14.15
2000-12-01	14.53
2001-01-01	14.74
2001-02-01	14.79
2001-03-01	15.58
2001-04-01	16.09
2001-05-01	16.33
2001-06-01	16.65
2001-07-01	17.17
2001-08-01	17.67
2001-09-01	17.57
2001-10-01	17.58
2001-11-01	17.60
2001-12-01	17.62
2002-01-01	16.93
2002-02-01	16.86
2002-03-01	16.76
2002-04-01	16.61
2002-05-01	15.51
2002-06-01	15.11
2002-07-01	14.93
2002-08-01	14.35
2002-09-01	13.22
2002-10-01	13.10
2002-11-01	13.06
2002-12-01	12.93
2003-01-01	12.69
2003-02-01	12.24
2003-03-01	11.40
2003-04-01	11.06
2003-05-01	10.44
2003-06-01	9.53
2003-07-01	9.10
2003-08-01	8.91
2003-09-01	8.66
2003-10-01	8.48
2003-11-01	8.49
2003-12-01	8.31
2004-01-01	7.86
2004-02-01	7.70
2004-03-01	7.42
2004-04-01	7.33
2004-05-01	7.32
2004-06-01	7.34
2004-07-01	7.36
2004-08-01	7.37
2004-09-01	7.39
2004-10-01	7.41
2004-11-01	7.41
2004-12-01	7.43
2005-01-01	7.42
2005-02-01	7.43
2005-03-01	7.44
2005-04-01	7.70
2005-05-01	7.95
2005-06-01	8.25
2005-07-01	8.50
2005-08-01	8.75
2005-09-01	10.00
2005-10-01	11.00
2005-11-01	12.25
2005-12-01	12.75
2006-01-01	12.75
2006-02-01	12.75
2006-03-01	12.75
2006-04-01	12.75
2006-05-01	12.50
2006-06-01	12.50
2006-07-01	12.25
2006-08-01	11.75
2006-09-01	11.25
2006-10-01	10.75
2006-11-01	10.25
2006-12-01	9.75
2007-01-01	9.50
2007-02-01	9.25
2007-03-01	9.00
2007-04-01	9.00
2007-05-01	8.75
2007-06-01	8.50
2007-07-01	8.25
2007-08-01	8.25
2007-09-01	8.25
2007-10-01	8.25
2007-11-01	8.25
2007-12-01	8.00
2008-01-01	8.00
2008-02-01	8.00
2008-03-01	8.00
2008-04-01	8.00
2008-05-01	8.25
2008-06-01	8.50
2008-07-01	8.75
2008-08-01	9.00
2008-09-01	9.25
2008-10-01	9.50
2008-11-01	9.50
2008-12-01	9.25
2009-01-01	8.75
2009-02-01	8.25
2009-03-01	7.75
2009-04-01	7.50
2009-05-01	7.25
2009-06-01	7.00
2009-07-01	6.75
2009-08-01	6.50
2009-09-01	6.50
2009-10-01	6.50
2009-11-01	6.50
2009-12-01	6.50
2010-01-01	6.50
2010-02-01	6.50
2010-03-01	6.50
2010-04-01	6.50
2010-05-01	6.50
2010-06-01	6.50
2010-07-01	6.50
2010-08-01	6.50
2010-09-01	6.50
2010-10-01	6.50
2010-11-01	6.50
2010-12-01	6.50
2011-01-01	6.50
2011-02-01	6.75
2011-03-01	6.75
2011-04-01	6.75
2011-05-01	6.75
2011-06-01	6.75
2011-07-01	6.75
2011-08-01	6.75
2011-09-01	6.75
2011-10-01	6.50
2011-11-01	6.00
2011-12-01	6.00
2012-01-01	6.00
2012-02-01	5.75
2012-03-01	5.75
2012-04-01	5.75
2012-05-01	5.75
2012-06-01	5.75
2012-07-01	5.75
2012-08-01	5.75
2012-09-01	5.75
2012-10-01	5.75
2012-11-01	5.75
2012-12-01	5.75
2013-01-01	5.75
2013-02-01	5.75
2013-03-01	5.75
2013-04-01	5.75
2013-05-01	5.75
2013-06-01	6.00
2013-07-01	6.50
2013-08-01	7.00
2013-09-01	7.25
2013-10-01	7.25
2013-11-01	7.50
2013-12-01	7.50
2014-01-01	7.50
2014-02-01	7.50
2014-03-01	7.50
2014-04-01	7.50
2014-05-01	7.50
2014-06-01	7.50
2014-07-01	7.50
2014-08-01	7.50
2014-09-01	7.50
2014-10-01	7.50
2014-11-01	7.75
2014-12-01	7.75
2015-01-01	7.75
2015-02-01	7.50
2015-03-01	7.50
2015-04-01	7.50
2015-05-01	7.50
2015-06-01	7.50
2015-07-01	7.50
2015-08-01	7.50
2015-09-01	7.50
2015-10-01	7.50
2015-11-01	7.50
2015-12-01	7.50
2016-01-01	7.25
2016-02-01	7.00
2016-03-01	6.75
2016-04-01	6.75
2016-05-01	6.75
2016-06-01	6.50
2016-07-01	6.50
2016-08-01	5.25
2016-09-01	5.00
2016-10-01	4.75
2016-11-01	4.75
2016-12-01	4.75
2017-01-01	4.75
2017-02-01	4.75
2017-03-01	4.75
2017-04-01	4.75
2017-05-01	4.75
2017-06-01	4.75
2017-07-01	4.75
2017-08-01	4.50
2017-09-01	4.25
2017-10-01	4.25
2017-11-01	4.25
2017-12-01	4.25
2018-01-01	4.25
2018-02-01	4.25
2018-03-01	4.25
2018-04-01	4.25
2018-05-01	4.75
2018-06-01	5.25
2018-07-01	5.25
2018-08-01	5.50
2018-09-01	5.75
2018-10-01	5.75