Year	Percent
2005-01-01	31.5039405034302
2006-01-01	32.1500976899038
2007-01-01	32.2087747685298
2008-01-01	31.1566202677051
2009-01-01	29.6276723136768
2010-01-01	29.7872887909822
2011-01-01	29.6775432446184
2012-01-01	30.2925203509722
2013-01-01	29.4962679680720
2014-01-01	28.5525311654590
2015-01-01	28.3966328235917
2016-01-01	28.4463630015598
2017-01-01	28.2901361119662