Year	% (national estimate)
1975	44.79
1976	43.98
1978	79.43
1983	76
1985	76.41
1987	76.59
1988	76.84
1989	76.28
1990	75.94
2001	73.314
2002	72.1
2003	72.949
2004	73.982
2005	73.242
2006	72.527
2007	72.694
2008	72.66
2009	72.494
2010	72.369
2011	73.145
2012	72.69
2013	72.284
2014	72.753
2015	72.08
2016	73.138
2017	71.513
2018	70.942
2019	70.878
2020	65.247
2021	66.62
2022	70.788