Year	Percent
2005-01-01	45.3
2006-01-01	45.3
2007-01-01	45.3
2008-01-01	44.8
2009-01-01	42.7
2010-01-01	41.4
2011-01-01	41.3
2012-01-01	41.2
2013-01-01	41.7
2014-01-01	42.2
2015-01-01	42.9
2016-01-01	43.6