Year	% (national estimate)
1963	34.57
1975	34.18
1984	43.73
1985	27.65
1990	26.35
1991	43.16
1992	44.58
1993	44.69
1994	47.5
1995	49.1
1996	46.24
1998	51.05
1999	48.544
2000	49.843
2001	51.724
2002	46.871
2003	44.909
2004	44.475
2005	45.826
2006	44.951
2007	45.924
2008	46.005
2009	46.126
2010	45.121
2011	46.393
2012	45.677
2013	45.047
2014	45.537
2015	43.691
2016	42.904
2017	41.446
2018	42.288
2019	42.321
2020	38.547
2021	38.946
2022	40.383
2023	42.859