Year	% (national estimate)
1983	33.381
1984	31.593
1985	32.36
1986	33.716
1987	32.618
1988	30.869
1989	30.418
1990	30.402
1991	31.382
1992	31.427
1993	28.057
1994	27.505
1995	26.591
1996	26.058
1997	25.224
1998	25.982
1999	25.451
2000	30.283
2001	28.457
2002	28.538
2003	27.146
2004	28.071
2005	27.494
2006	27.579
2007	27.486
2008	27.4
2009	25.324
2010	25.228
2011	25.991
2012	25.262
2013	23.644
2014	23.181
2015	23.362
2016	22.732
2017	22.677
2018	24.964
2019	26.57
2020	24.073
2021	24.748
2022	25.97
2023	26.495