Year	Percent
2006-01-01	51.3
2007-01-01	59
2008-01-01	55.9
2009-01-01	58.4
2010-01-01	67.7
2011-01-01	61.6
2012-01-01	64.9
2013-01-01	59.6
2014-01-01	58.8
2015-01-01	53.4