Year	Percent
2005-01-01	46.5
2006-01-01	46.4
2007-01-01	46.8
2008-01-01	46.9
2009-01-01	48.4
2010-01-01	49.1
2011-01-01	49.1
2012-01-01	49.2
2013-01-01	49.4
2014-01-01	49.4
2015-01-01	49.6
2016-01-01	49.5