Year	% (national estimate)
1983	42.677
1984	39.233
1985	38.171
1986	39.021
1987	37.965
1988	36.137
1989	36.405
1990	35.742
1991	32.037
1992	30.918
1993	28.323
1994	25.917
1995	25.877
1996	25.331
1997	24.099
1998	25.063
1999	26.385
2000	28.162
2001	29.314
2002	29.903
2003	30.735
2004	29.445
2005	26.803
2006	26.427
2007	27.804
2008	28.033
2009	27.011
2010	26.725
2011	26.133
2012	25.014
2013	26.623
2014	25.755
2015	25.969
2016	26.099
2017	26.994
2018	28.121
2019	27.863
2020	26.882
2021	30.562
2022	33.049
2023	35.193