Year	% (national estimate)
1983	28.094
1984	26.602
1985	25.677
1986	26.185
1987	26.013
1988	26.96
1989	27.631
1990	27.817
1991	27.671
1992	25.26
1993	23.558
1994	21.903
1995	20.773
1996	20.524
1997	20.132
1998	20.389
1999	20.84
2000	21.979
2001	22.214
2002	21.149
2003	20.826
2004	22.708
2005	20.807
2006	20.028
2007	19.503
2008	19.233
2009	16.918
2010	16.32
2011	15.476
2012	14.977
2013	13.7
2014	12.776
2015	12.442
2016	13.738
2017	13.871
2018	14.281
2019	15.151
2020	12.814
2021	13.524
2022	15.971
2023	16.179