Year	Percent
2005-01-01	8.0
2006-01-01	7.9
2007-01-01	7.9
2008-01-01	7.9
2009-01-01	8.3
2010-01-01	8.5
2011-01-01	8.6
2012-01-01	8.6
2013-01-01	8.7
2014-01-01	8.8
2015-01-01	8.7
2016-01-01	8.7