Year	Percent
2005-01-01	44.5
2006-01-01	44.4
2007-01-01	44.2
2008-01-01	44.0
2009-01-01	43.4
2010-01-01	42.7
2011-01-01	42.6
2012-01-01	42.6
2013-01-01	42.7
2014-01-01	42.7
2015-01-01	42.8
2016-01-01	43.0