Year	Percent
2005-01-01	87.1
2006-01-01	87.5
2007-01-01	87.9
2008-01-01	87.5
2009-01-01	84.8
2010-01-01	84.6
2011-01-01	85.0
2012-01-01	85.1
2013-01-01	84.9
2014-01-01	85.3
2015-01-01	85.8
2016-01-01	86.2