Month	Percent
1998-01-01	22.86
1998-02-01	24.00
1998-03-01	27.26
1998-04-01	29.40
1998-05-01	32.95
1998-06-01	40.63
1998-07-01	43.01
1998-08-01	44.35
1998-09-01	47.38
1998-10-01	54.67
1998-11-01	53.06
1998-12-01	49.23
1999-01-01	45.50
1999-02-01	38.20
1999-03-01	34.85
1999-04-01	34.09
1999-05-01	31.20
1999-06-01	27.39
1999-07-01	23.45
1999-08-01	19.06
1999-09-01	15.88
1999-10-01	13.37
1999-11-01	12.91
1999-12-01	12.95
2000-01-01	12.85
2000-02-01	12.64
2000-03-01	12.40
2000-04-01	12.16
2000-05-01	11.81
2000-06-01	11.69
2000-07-01	11.79
2000-08-01	12.36
2000-09-01	12.84
2000-10-01	13.09
2000-11-01	13.17
2000-12-01	13.24
2001-01-01	13.83
2001-02-01	14.35
2001-03-01	14.86
2001-04-01	14.93
2001-05-01	14.92
2001-06-01	15.00
2001-07-01	15.14
2001-08-01	15.62
2001-09-01	16.16
2001-10-01	16.67
2001-11-01	17.06
2001-12-01	17.24
2002-01-01	17.39
2002-02-01	17.24
2002-03-01	17.02
2002-04-01	16.57
2002-05-01	16.24
2002-06-01	15.85
2002-07-01	15.26
2002-08-01	14.77
2002-09-01	14.36
2002-10-01	13.94
2002-11-01	13.76
2002-12-01	13.63
2003-01-01	13.49
2003-02-01	13.15
2003-03-01	12.90
2003-04-01	12.48
2003-05-01	12.02
2003-06-01	11.55
2003-07-01	10.65
2003-08-01	9.58
2003-09-01	8.58
2003-10-01	7.96
2003-11-01	7.58
2003-12-01	7.14
2004-01-01	6.68
2004-02-01	6.38
2004-03-01	6.11
2004-04-01	6.01
2004-05-01	6.17
2004-06-01	6.31
2004-07-01	6.49
2004-08-01	6.54
2004-09-01	6.61
2004-10-01	6.65
2004-11-01	6.66
2004-12-01	6.71
2005-01-01	6.71
2005-02-01	6.74
2005-03-01	6.93
2005-04-01	6.87
2005-05-01	7.03
2005-06-01	7.19
2005-07-01	7.41
2005-08-01	7.71
2005-09-01	8.51
2005-10-01	9.38
2005-11-01	10.72
2005-12-01	11.75
2006-01-01	12.23
2006-02-01	12.32
2006-03-01	12.19
2006-04-01	12.03
2006-05-01	11.82
2006-06-01	11.70
2006-07-01	11.57
2006-08-01	11.34
2006-09-01	11.05
2006-10-01	10.72
2006-11-01	10.25
2006-12-01	9.71
2007-01-01	9.26
2007-02-01	8.83
2007-03-01	8.52
2007-04-01	8.30
2007-05-01	8.06
2007-06-01	7.87
2007-07-01	7.69
2007-08-01	7.51
2007-09-01	7.44
2007-10-01	7.41
2007-11-01	7.40
2007-12-01	7.42
2008-01-01	7.40
2008-02-01	7.36
2008-03-01	7.26
2008-04-01	7.23
2008-05-01	7.34
2008-06-01	7.49
2008-07-01	7.82
2008-08-01	8.40
2008-09-01	9.45
2008-10-01	10.17
2008-11-01	10.83
2008-12-01	11.16
2009-01-01	11.34
2009-02-01	11.13
2009-03-01	10.65
2009-04-01	10.09
2009-05-01	9.68
2009-06-01	9.25
2009-07-01	8.99
2009-08-01	8.73
2009-09-01	8.35
2009-10-01	7.97
2009-11-01	7.68
2009-12-01	7.48
2010-01-01	7.31
2010-02-01	7.08
2010-03-01	6.99
2010-04-01	6.98
2010-05-01	6.95
2010-06-01	6.95
2010-07-01	6.95
2010-08-01	6.96
2010-09-01	6.95
2010-10-01	6.99
2010-11-01	7.03
2010-12-01	7.06
2011-01-01	6.88
2011-02-01	6.82
2011-03-01	6.91
2011-04-01	6.95
2011-05-01	6.91
2011-06-01	6.95
2011-07-01	6.88
2011-08-01	6.90
2011-09-01	7.05
2011-10-01	7.11
2011-11-01	6.99
2011-12-01	6.81
2012-01-01	6.68
2012-02-01	6.52
2012-03-01	6.31
2012-04-01	6.00
2012-05-01	5.89
2012-06-01	5.76
2012-07-01	5.67
2012-08-01	5.61
2012-09-01	5.69
2012-10-01	5.66
2012-11-01	5.81
2012-12-01	5.76
2013-01-01	5.89
2013-02-01	5.92
2013-03-01	5.64
2013-04-01	5.73
2013-05-01	5.68
2013-06-01	5.72
2013-07-01	5.99
2013-08-01	6.16
2013-09-01	6.56
2013-10-01	6.95
2013-11-01	7.30
2013-12-01	7.61
2014-01-01	7.95
2014-02-01	8.03
2014-03-01	8.28
2014-04-01	8.34
2014-05-01	8.90
2014-06-01	8.34
2014-07-01	9.19
2014-08-01	9.45
2014-09-01	9.38
2014-10-01	9.25
2014-11-01	9.02
2014-12-01	8.95
2015-01-01	8.91
2015-02-01	8.94
2015-03-01	8.81
2015-04-01	8.59
2015-05-01	8.50
2015-06-01	8.27
2015-07-01	8.13
2015-08-01	8.06
2015-09-01	7.95
2015-10-01	7.99
2015-11-01	7.90
2015-12-01	7.99
2016-01-01	7.90
2016-02-01	7.97
2016-03-01	7.75
2016-04-01	7.27
2016-05-01	7.21
2016-06-01	7.00
2016-07-01	6.98
2016-08-01	6.94
2016-09-01	6.84
2016-10-01	6.75
2016-11-01	6.69
2016-12-01	6.69
2017-01-01	6.75
2017-02-01	6.74
2017-03-01	6.69
2017-04-01	6.64
2017-05-01	6.62
2017-06-01	6.62
2017-07-01	6.56
2017-08-01	6.54
2017-09-01	6.46
2017-10-01	6.32
2017-11-01	6.17
2017-12-01	6.11
2018-01-01	6.03
2018-02-01	5.97
2018-03-01	5.88
2018-04-01	5.83
2018-05-01	5.79
2018-06-01	5.83
2018-07-01	5.99
2018-08-01	6.12
2018-09-01	6.26