Month	Percent
2012-01-01	19
2012-02-01	18.9
2012-03-01	18.4
2012-04-01	18.4
2012-05-01	17.8
2012-06-01	17.9
2012-07-01	18.6
2012-08-01	17.3
2012-09-01	17.6
2012-10-01	17.8
2012-11-01	18.4
2012-12-01	18.2
2013-01-01	18.3
2013-02-01	18.2
2013-03-01	18.6
2013-04-01	18
2013-05-01	18.5
2013-06-01	18.3
2013-07-01	18.2
2013-08-01	18.5
2013-09-01	18.2
2013-10-01	18.2
2013-11-01	18.4
2013-12-01	18.2
2014-01-01	17.6
2014-02-01	17.3
2014-03-01	17.2
2014-04-01	17.1
2014-05-01	17
2014-06-01	17.9
2014-07-01	18
2014-08-01	18.1
2014-09-01	17.3
2014-10-01	17.9
2014-11-01	17.2
2014-12-01	16.9
2015-01-01	17.4
2015-02-01	17.8
2015-03-01	17.8
2015-04-01	17.1
2015-05-01	17.5
2015-06-01	17.4
2015-07-01	17.8
2015-08-01	17.8
2015-09-01	17.0
2015-10-01	17.1
2015-11-01	17.3
2015-12-01	16.8
2016-01-01	17.7
2016-02-01	17.7
2016-03-01	17.6
2016-04-01	17.3
2016-05-01	17.3
2016-06-01	17.5
2016-07-01	17.1
2016-08-01	17.3
2016-09-01	16.9
2016-10-01	17.4
2016-11-01	17.3
2016-12-01	17.0
2017-01-01	17.2
2017-02-01	17.2
2017-03-01	17.3
2017-04-01	17.0
2017-05-01	16.7
2017-06-01	17.3
2017-07-01	17.6
2017-08-01	18.1
2017-09-01	17.2
2017-10-01	17.0
2017-11-01	16.9
2017-12-01	16.8
2018-01-01	17.3
2018-02-01	17.1
2018-03-01	17.5
2018-04-01	16.7
2018-05-01	16.3
2018-06-01	16.6
2018-07-01	16.9
2018-08-01	17.2
2018-09-01	17.1