Month	Percent
2007-01-01	22.24
2007-02-01	20.49
2007-03-01	23.01
2007-04-01	20.74
2007-05-01	21.68
2007-06-01	20.90
2007-07-01	21.23
2007-08-01	22.34
2007-09-01	21.82
2007-10-01	20.12
2007-11-01	20.45
2007-12-01	21.46
2008-01-01	21.29
2008-02-01	21.72
2008-03-01	20.34
2008-04-01	20.30
2008-05-01	21.28
2008-06-01	22.04
2008-07-01	21.81
2008-08-01	21.09
2008-09-01	21.48
2008-10-01	21.46
2008-11-01	21.04
2008-12-01	20.83
2009-01-01	21.00
2009-02-01	19.80
2009-03-01	19.43
2009-04-01	18.81
2009-05-01	18.86
2009-06-01	19.14
2009-07-01	19.11
2009-08-01	20.19
2009-09-01	19.99
2009-10-01	17.70
2009-11-01	18.55
2009-12-01	18.50
2010-01-01	18.28
2010-02-01	19.34
2010-03-01	19.67
2010-04-01	18.96
2010-05-01	19.12
2010-06-01	18.41
2010-07-01	18.87
2010-08-01	18.76
2010-09-01	18.69
2010-10-01	18.33
2010-11-01	18.57
2010-12-01	17.66
2011-01-01	18.56
2011-02-01	18.88
2011-03-01	18.46
2011-04-01	18.88
2011-05-01	18.26
2011-06-01	18.32
2011-07-01	18.52
2011-08-01	19.29
2011-09-01	18.63
2011-10-01	16.42
2011-11-01	17.47
2011-12-01	16.90
2012-01-01	18.16
2012-02-01	18.03
2012-03-01	17.77
2012-04-01	18.40
2012-05-01	17.61
2012-06-01	17.55
2012-07-01	17.98
2012-08-01	17.23
2012-09-01	18.57
2012-10-01	17.40
2012-11-01	17.98
2012-12-01	18.04
2013-01-01	17.84
2013-02-01	18.24
2013-03-01	19.08
2013-04-01	19.57
2013-05-01	17.57
2013-06-01	19.20
2013-07-01	18.65
2013-08-01	18.49
2013-09-01	18.73
2013-10-01	17.78
2013-11-01	18.62
2013-12-01	17.82
2014-01-01	18.25
2014-02-01	18.81
2014-03-01	19.10
2014-04-01	19.16
2014-05-01	18.22
2014-06-01	18.69
2014-07-01	18.86
2014-08-01	18.37
2014-09-01	18.29
2014-10-01	17.02
2014-11-01	17.72
2014-12-01	17.91
2015-01-01	18.32
2015-02-01	18.45
2015-03-01	18.95
2015-04-01	18.32
2015-05-01	18.30
2015-06-01	19.15
2015-07-01	18.21
2015-08-01	18.68
2015-09-01	19.43
2015-10-01	17.41
2015-11-01	17.80
2015-12-01	17.50
2016-01-01	18.42
2016-02-01	18.74
2016-03-01	19.82
2016-04-01	18.47
2016-05-01	19.69
2016-06-01	18.50
2016-07-01	19.67
2016-08-01	18.36
2016-09-01	19.62
2016-10-01	18.21
2016-11-01	18.54
2016-12-01	18.04
2017-01-01	18.23
2017-02-01	19.38
2017-03-01	19.49
2017-04-01	19.23
2017-05-01	19.25
2017-06-01	18.83
2017-07-01	19.31
2017-08-01	18.83
2017-09-01	19.67
2017-10-01	18.96
2017-11-01	18.46
2017-12-01	19.18
2018-01-01	19.61
2018-02-01	19.64
2018-03-01	19.94
2018-04-01	19.77
2018-05-01	19.30
2018-06-01	18.92
2018-07-01	19.24