Year	% (national estimate)
1986	80.824
1987	79.462
1988	75.323
1989	73.772
1990	72.525
1991	71.413
1992	69.647
1993	68.761
1994	70.033
1995	71.236
1996	70.547
1997	69.653
1998	67.901
1999	66.641
2000	65.818
2001	66.179
2002	66.715
2003	65.283
2004	65.687
2005	65.521
2006	67.309
2007	67.053
2008	65.904
2009	63.846
2010	61.656
2011	62.195
2012	61.067
2013	59.696
2014	62.296
2015	63.653
2016	64.74
2017	65.219
2018	64.56
2019	63.771
2020	63.881
2021	65.411
2022	67.738
2023	69.246