Year	Percent
2000	59.2131
2001	60.8715
2002	66.042
2003	66.6243
2004	64.1016
2005	64.1305
2006	62.108
2007	59.848
2008	50.3148
2009	52.3527
2010	55.0111
2011	55.0497
2012	56.6814
2013	55.546
2014	55.3036
2015	54.8902
2016	59.3135
2017	58.6476