Month	Percent
2007-01-01	18.70
2007-02-01	17.39
2007-03-01	15.99
2007-04-01	15.06
2007-05-01	15.35
2007-06-01	14.07
2007-07-01	14.37
2007-08-01	14.02
2007-09-01	13.93
2007-10-01	13.22
2007-11-01	12.71
2007-12-01	13.37
2008-01-01	17.13
2008-02-01	16.73
2008-03-01	14.79
2008-04-01	14.80
2008-05-01	13.36
2008-06-01	14.76
2008-07-01	15.64
2008-08-01	14.99
2008-09-01	14.79
2008-10-01	12.78
2008-11-01	13.76
2008-12-01	13.70
2009-01-01	18.77
2009-02-01	17.20
2009-03-01	15.35
2009-04-01	15.63
2009-05-01	14.87
2009-06-01	15.17
2009-07-01	16.37
2009-08-01	16.25
2009-09-01	15.71
2009-10-01	15.47
2009-11-01	14.63
2009-12-01	15.02
2010-01-01	18.77
2010-02-01	16.76
2010-03-01	15.99
2010-04-01	15.73
2010-05-01	15.55
2010-06-01	15.60
2010-07-01	16.47
2010-08-01	15.41
2010-09-01	14.24
2010-10-01	13.84
2010-11-01	14.46
2010-12-01	15.59
2011-01-01	18.21
2011-02-01	17.93
2011-03-01	14.63
2011-04-01	15.08
2011-05-01	14.22
2011-06-01	14.14
2011-07-01	15.35
2011-08-01	13.29
2011-09-01	13.28
2011-10-01	12.00
2011-11-01	12.30
2011-12-01	13.58
2012-01-01	17.35
2012-02-01	16.38
2012-03-01	13.42
2012-04-01	13.83
2012-05-01	14.19
2012-06-01	13.46
2012-07-01	14.07
2012-08-01	12.90
2012-09-01	12.39
2012-10-01	11.87
2012-11-01	12.23
2012-12-01	13.49
2013-01-01	16.03
2013-02-01	15.91
2013-03-01	12.88
2013-04-01	13.20
2013-05-01	11.85
2013-06-01	11.98
2013-07-01	13.24
2013-08-01	12.26
2013-09-01	11.67
2013-10-01	10.24
2013-11-01	11.35
2013-12-01	12.20
2014-01-01	15.24
2014-02-01	14.75
2014-03-01	12.55
2014-04-01	11.46
2014-05-01	11.48
2014-06-01	12.05
2014-07-01	11.62
2014-08-01	11.64
2014-09-01	10.90
2014-10-01	10.21
2014-11-01	10.59
2014-12-01	11.55
2015-01-01	14.25
2015-02-01	13.63
2015-03-01	11.56
2015-04-01	12.30
2015-05-01	11.33
2015-06-01	11.47
2015-07-01	11.09
2015-08-01	12.49
2015-09-01	11.47
2015-10-01	10.80
2015-11-01	9.85
2015-12-01	11.95
2016-01-01	16.45
2016-02-01	13.29
2016-03-01	12.90
2016-04-01	11.96
2016-05-01	11.31
2016-06-01	11.27
2016-07-01	12.79
2016-08-01	11.75
2016-09-01	10.96
2016-10-01	10.83
2016-11-01	9.70
2016-12-01	11.85
2017-01-01	14.85
2017-02-01	14.52
2017-03-01	13.10
2017-04-01	11.10
2017-05-01	12.52
2017-06-01	11.67
2017-07-01	13.24
2017-08-01	11.61
2017-09-01	12.28
2017-10-01	10.88
2017-11-01	11.09
2017-12-01	11.27
2018-01-01	15.54
2018-02-01	14.04
2018-03-01	12.58
2018-04-01	11.98
2018-05-01	12.69
2018-06-01	11.99
2018-07-01	12.65