Month Percent 2012-01-01 24.7 2012-02-01 23.5 2012-03-01 24.4 2012-04-01 24.3 2012-05-01 23.9 2012-06-01 23.9 2012-07-01 24.5 2012-08-01 26.2 2012-09-01 26.8 2012-10-01 25.8 2012-11-01 23.5 2012-12-01 22.5 2013-01-01 22.5 2013-02-01 20.4 2013-03-01 21.6 2013-04-01 23.1 2013-05-01 22.8 2013-06-01 24.8 2013-07-01 24.9 2013-08-01 24.3 2013-09-01 23.6 2013-10-01 24.4 2013-11-01 23.8 2013-12-01 23.3 2014-01-01 22.3 2014-02-01 21.1 2014-03-01 23.3 2014-04-01 23.9 2014-05-01 22.8 2014-06-01 23.4 2014-07-01 24.3 2014-08-01 24.3 2014-09-01 25.2 2014-10-01 25.7 2014-11-01 26 2014-12-01 23.9 2015-01-01 23.8 2015-02-01 23.5 2015-03-01 23.1 2015-04-01 23.5 2015-05-01 22.0 2015-06-01 22.2 2015-07-01 22.6 2015-08-01 22.6 2015-09-01 23.6 2015-10-01 24.9 2015-11-01 24.7 2015-12-01 24.8 2016-01-01 24.5 2016-02-01 24.7 2016-03-01 23.4 2016-04-01 22.5 2016-05-01 22.6 2016-06-01 22.9 2016-07-01 22.8 2016-08-01 21.7 2016-09-01 24.4 2016-10-01 22.5 2016-11-01 22.9 2016-12-01 23.7 2017-01-01 22.2 2017-02-01 22.2 2017-03-01 23.5 2017-04-01 22.1 2017-05-01 23.3 2017-06-01 23.5 2017-07-01 22.1 2017-08-01 22.9 2017-09-01 23.1 2017-10-01 22.6 2017-11-01 21.4 2017-12-01 22.9 2018-01-01 22.6 2018-02-01 22.1 2018-03-01 23.4 2018-04-01 24.0 2018-05-01 22.2 2018-06-01 23.2 2018-07-01 24.1 2018-08-01 24.2 2018-09-01 24.0