Year	Percent
2005-01-01	60.1
2006-01-01	60.6
2007-01-01	60.8
2008-01-01	61.2
2009-01-01	61.4
2010-01-01	61.5
2011-01-01	61.7
2012-01-01	62.1
2013-01-01	62.5
2014-01-01	62.7
2015-01-01	62.9
2016-01-01	63.5