Year	Percent
2005-01-01	65.9
2006-01-01	66.2
2007-01-01	66.3
2008-01-01	65.8
2009-01-01	63.3
2010-01-01	62.9
2011-01-01	63.0
2012-01-01	63.1
2013-01-01	63.0
2014-01-01	63.2
2015-01-01	63.4
2016-01-01	63.8