Year	% (national estimate)
1984	69.26
1985	70.65
1986	71.38
1987	72.48
1988	74.16
1989	71.6
1994	73.34
1996	73.8
1998	74.9
2002	71.57
2005	71.323
2006	73.452
2007	73.76
2008	74.158
2009	73.5
2010	72.732
2011	72.676
2012	72.203
2016	70.9
2017	75.806
2020	67.42