Year	% (national estimate)
1990	59.99
1992	58.17
1993	59.78
1994	57.38
1995	59.66
1999	53.84
2009	72.01
2010	74.17
2011	71.94
2012	69.8
2013	72.93
2014	73.51
2015	69.38
2016	63.513