Year	% (national estimate)
1983	52.952
1984	63.73
1985	66.882
1986	69.098
1987	68.813
1988	69.482
1989	66.681
1990	65.009
1991	64.746
1992	63.128
1993	60.226
1994	62.066
1995	65.947
1996	65.953
1997	68.229
1998	66.425
1999	66.041
2000	67.057
2001	61.668
2002	63.95
2003	59.392
2004	61.259
2005	62.266
2006	64.565
2007	65.298
2008	62.506
2009	58.713
2010	53.996
2011	52.997
2012	51.345
2013	49.516
2014	49.977
2015	51.337
2016	52.288
2017	52.889
2018	53.735
2019	54.98
2020	53.227
2021	53.866
2022	56.142
2023	57.04