Year	% (national estimate)
1983	53.098
1984	52.314
1985	54.278
1986	52.609
1987	50.562
1988	48.909
1989	48.557
1990	41.83
1991	48.706
1992	48.786
1993	43.564
1994	41.772
1995	36.837
1996	35.318
1997	32.07
1998	30.99
1999	29.509
2000	28.334
2001	30.316
2002	28.377
2003	26.058
2004	20.463
2005	21.348
2006	21.218
2007	18.415
2008	20.592
2009	25.03
2010	21.531
2011	18.738
2012	20.655
2013	18.577
2014	19.128
2015	29.726
2016	24.382
2017	24.905
2018	28.439
2019	26.319
2020	24.354
2021	29.531
2022	28.54
2023	25.781