Month Percent 2012-01-01 76 2012-02-01 76 2012-03-01 76.7 2012-04-01 76.8 2012-05-01 77 2012-06-01 77.2 2012-07-01 76.8 2012-08-01 77.8 2012-09-01 77.5 2012-10-01 76.8 2012-11-01 76.4 2012-12-01 76.7 2013-01-01 76.7 2013-02-01 76.7 2013-03-01 76.8 2013-04-01 77.2 2013-05-01 76.6 2013-06-01 77.1 2013-07-01 77.3 2013-08-01 77.1 2013-09-01 77.5 2013-10-01 77.3 2013-11-01 77.1 2013-12-01 77.3 2014-01-01 77.7 2014-02-01 78.4 2014-03-01 78.6 2014-04-01 78.5 2014-05-01 78.6 2014-06-01 78 2014-07-01 78 2014-08-01 77.6 2014-09-01 78.2 2014-10-01 77.8 2014-11-01 78.5 2014-12-01 78.8 2015-01-01 78.2 2015-02-01 78.3 2015-03-01 78.4 2015-04-01 79.4 2015-05-01 78.9 2015-06-01 78.9 2015-07-01 78.2 2015-08-01 78.6 2015-09-01 79.0 2015-10-01 78.7 2015-11-01 78.9 2015-12-01 79.3 2016-01-01 78.4 2016-02-01 78.4 2016-03-01 78.8 2016-04-01 79.3 2016-05-01 79.6 2016-06-01 79.4 2016-07-01 79.7 2016-08-01 79.1 2016-09-01 79.3 2016-10-01 79.2 2016-11-01 79.4 2016-12-01 79.7 2017-01-01 79.5 2017-02-01 79.7 2017-03-01 79.7 2017-04-01 79.9 2017-05-01 80.1 2017-06-01 79.5 2017-07-01 79.5 2017-08-01 79.0 2017-09-01 79.8 2017-10-01 79.7 2017-11-01 79.9 2017-12-01 80.2 2018-01-01 79.8 2018-02-01 80.2 2018-03-01 79.9 2018-04-01 80.3 2018-05-01 80.7 2018-06-01 80.3 2018-07-01 80.6 2018-08-01 79.8 2018-09-01 79.8