Year	% (national estimate)
1986	39.504
1987	42.342
1988	43.523
1989	44.867
1990	45.98
1991	45.005
1992	41.04
1993	36.671
1994	34.546
1995	32.271
1996	30.614
1997	32.623
1998	38.692
1999	37.469
2000	35.209
2001	36.57
2002	36.71
2003	34.484
2004	31.975
2005	30.803
2006	30.681
2007	30.15
2008	30.347
2009	29.156
2010	25.997
2011	24.499
2012	21.201
2013	20.392
2014	21.867
2015	21.499
2016	22.25
2017	24.084
2018	25.078
2019	25.502
2020	21.333
2021	20.021
2022	23.052
2023	26.849