Year	% (national estimate)
1983	37.318
1984	34.564
1985	34.064
1986	35.219
1987	33.851
1988	32.621
1989	32.878
1990	31.995
1991	29.267
1992	27.881
1993	26.185
1994	23.959
1995	23.439
1996	22.769
1997	21.701
1998	22.681
1999	23.127
2000	25.08
2001	25.65
2002	25.899
2003	27.494
2004	26.696
2005	23.543
2006	23.02
2007	24.95
2008	24.999
2009	24.887
2010	23.81
2011	23.355
2012	22.733
2013	23.732
2014	23.455
2015	24.039
2016	23.959
2017	24.599
2018	25.579
2019	25.847
2020	24.689
2021	28.879
2022	31.487
2023	33.591