Month	Percent
2004-01-01	14.4
2004-02-01	14.4
2004-03-01	14.5
2004-04-01	13.5
2004-05-01	13.9
2004-06-01	14.2
2004-07-01	13.5
2004-08-01	13.3
2004-09-01	13.8
2004-10-01	13.6
2004-11-01	13.4
2004-12-01	13.1
2005-01-01	14.7
2005-02-01	15.3
2005-03-01	14.5
2005-04-01	13.9
2005-05-01	13.7
2005-06-01	13.9
2005-07-01	13.2
2005-08-01	13.2
2005-09-01	13.5
2005-10-01	12.9
2005-11-01	13.2
2005-12-01	12.4
2006-01-01	13.8
2006-02-01	13.9
2006-03-01	13.5
2006-04-01	12.7
2006-05-01	12.8
2006-06-01	13.0
2006-07-01	12.7
2006-08-01	12.5
2006-09-01	12.8
2006-10-01	12.6
2006-11-01	12.3
2006-12-01	11.9
2007-01-01	13.0
2007-02-01	13.3
2007-03-01	12.5
2007-04-01	12.0
2007-05-01	12.2
2007-06-01	13.0
2007-07-01	12.2
2007-08-01	12.2
2007-09-01	12.6
2007-10-01	12.2
2007-11-01	12.3
2007-12-01	12.6
2008-01-01	13.6
2008-02-01	13.5
2008-03-01	12.9
2008-04-01	12.0
2008-05-01	13.6
2008-06-01	14.5
2008-07-01	14.4
2008-08-01	13.5
2008-09-01	14.0
2008-10-01	14.6
2008-11-01	14.7
2008-12-01	15.4
2009-01-01	17.2
2009-02-01	18.1
2009-03-01	18.6
2009-04-01	17.6
2009-05-01	18.8
2009-06-01	19.1
2009-07-01	18.7
2009-08-01	18.4
2009-09-01	18.8
2009-10-01	19.4
2009-11-01	19.1
2009-12-01	19.2
2010-01-01	21.2
2010-02-01	20.7
2010-03-01	20.5
2010-04-01	19.4
2010-05-01	18.2
2010-06-01	19.5
2010-07-01	18.5
2010-08-01	17.5
2010-09-01	17.6
2010-10-01	17.8
2010-11-01	17.8
2010-12-01	17.4
2011-01-01	18.5
2011-02-01	18.5
2011-03-01	18.3
2011-04-01	17.1
2011-05-01	17.3
2011-06-01	17.8
2011-07-01	17.3
2011-08-01	17.5
2011-09-01	17.0
2011-10-01	17.1
2011-11-01	17.3
2011-12-01	17.3
2012-01-01	18.2
2012-02-01	19.0
2012-03-01	17.8
2012-04-01	17.3
2012-05-01	17.5
2012-06-01	18.1
2012-07-01	17.5
2012-08-01	17.5
2012-09-01	16.6
2012-10-01	17.0
2012-11-01	16.5
2012-12-01	16.7
2013-01-01	18.8
2013-02-01	17.9
2013-03-01	17.7
2013-04-01	16.8
2013-05-01	17.3
2013-06-01	18.3
2013-07-01	17.3
2013-08-01	16.7
2013-09-01	16.7
2013-10-01	16.5
2013-11-01	15.2
2013-12-01	14.7
2014-01-01	16.9
2014-02-01	17.2
2014-03-01	16.8
2014-04-01	14.9
2014-05-01	15.1
2014-06-01	16.2
2014-07-01	15.5
2014-08-01	14.6
2014-09-01	15.2
2014-10-01	14.1
2014-11-01	13.9
2014-12-01	14.0
2015-01-01	15.4
2015-02-01	14.9
2015-03-01	14.9
2015-04-01	13.4
2015-05-01	14.3
2015-06-01	15.0
2015-07-01	13.7
2015-08-01	13.3
2015-09-01	13.1
2015-10-01	13.3
2015-11-01	13.2
2015-12-01	13.1
2016-01-01	13.6
2016-02-01	13.7
2016-03-01	13.4
2016-04-01	12.2
2016-05-01	12.5
2016-06-01	13.5
2016-07-01	13.2
2016-08-01	12.6
2016-09-01	12.5
2016-10-01	13.1
2016-11-01	12.3
2016-12-01	12.0
2017-01-01	13.0
2017-02-01	12.8
2017-03-01	12.1
2017-04-01	11.4
2017-05-01	11.3
2017-06-01	12.0
2017-07-01	11.6
2017-08-01	11.0
2017-09-01	11.8