Year	% (national estimate)
1976	59.889
1977	59.76
1978	60.408
1979	63.053
1980	63.357
1981	63.505
1982	56.129
1983	55.25
1984	57.291
1985	58.907
1986	60.74
1987	62.536
1988	64.008
1989	64.791
1990	62.603
1991	57.096
1992	54.41
1993	53.435
1994	54.101
1995	54.3
1996	53.234
1997	52.737
1998	52.938
1999	55.293
2000	56.724
2001	56.453
2002	57.318
2003	57.695
2004	57.469
2005	56.712
2006	58.45
2007	60.025
2008	59.749
2009	54.545
2010	54.195
2011	55.261
2012	54.432
2013	55.469
2014	55.31
2015	55.792
2016	55.107
2017	57.06
2018	57.357
2019	57.558
2020	49.506
2021	54.844
2022	57.329
2023	57.381