Year	Percent
2005-01-01	49.9801198281895
2006-01-01	48.4286105759026
2007-01-01	47.7287793931164
2008-01-01	47.6092881143730
2009-01-01	46.4776642122240
2010-01-01	46.7866270216962
2011-01-01	46.1136905152947
2012-01-01	44.7990336297585
2013-01-01	44.4627486225447
2014-01-01	45.4197240129026
2015-01-01	44.7693841250880
2016-01-01	44.5153703332827
2017-01-01	44.7422180670020