Year	% (national estimate)
1983	48.635
1984	44.234
1985	42.63
1986	43.156
1987	42.453
1988	39.945
1989	40.234
1990	39.704
1991	34.955
1992	34.139
1993	30.572
1994	27.967
1995	28.465
1996	28.028
1997	26.593
1998	27.517
1999	29.729
2000	31.26
2001	32.947
2002	33.85
2003	33.972
2004	32.193
2005	30.012
2006	29.82
2007	30.628
2008	31.011
2009	29.1
2010	29.603
2011	28.868
2012	27.258
2013	29.467
2014	28.005
2015	27.872
2016	28.193
2017	29.325
2018	30.607
2019	29.827
2020	29.022
2021	32.189
2022	34.556
2023	36.743