Year	% (national estimate)
1980	49.93614670338992
1981	52.46175531768091
1983	52.35952375068107
1984	53.25925414698887
1985	52.08794526736652
1986	53.81907613168928
1987	54.731284351864986
1988	52.50532155997852
1989	53.113871827240246
1990	49.11275544739953
1991	49.81704161266966
1992	48.60218515391454
1993	47.505074451771705
1994	47.63697280248796
1995	47.20036299239412
1996	46.691604792188855
1997	46.42613011926769
1998	46.61978541206668
1999	46.69449183314277
2000	46.538695439552036
2001	46.13782692737389
2002	45.65226171204276
2003	45.00875288671099
2004	44.60954736353087
2005	44.62582714577111
2006	44.67282463024888
2007	44.22077627904636
2008	43.98429384520652
2009	43.55773073235938
2010	42.795767490845016
2011	42.711675246527996
2012	42.66527809543057
2013	42.816537040903754
2014	42.66756393360022
2015	42.79131481300182
2016	42.93466836167102
2017	43.08843071258443
2018	43.28581277452998
2019	43.886661343972264
2020	41.68595547278999
2021	43.53047155473569
2022	44.144055993977666
2023	45.02570295169739