Year	Percent
2000	49.5978
2001	52.3871
2002	55.0503
2003	56.939
2004	50.5358
2005	49.9731
2006	48.6637
2007	46.9919
2008	41.7228
2009	45.0927
2010	48.1012
2011	46.2548
2012	47.636
2013	47.9778
2014	48.0218
2015	46.3429
2016	48.6184
2017	49.3051