Year	% (national estimate)
2000	50.22
2001	48.65
2002	47.72
2003	47.4
2004	47.36
2005	45.68
2006	46.02
2007	46.41
2008	47.21
2009	46.45
2010	43.85
2011	47.43
2012	46.41
2013	45.11
2014	44.81
2015	44.95