Year	% (national estimate)
1970	33.279
1980	35.96
1982	42.44
1983	43.59
1984	42.36
1985	42.82
1986	42.63
1987	43.59
1988	43.74
1989	43.69
1990	45.17
1991	35.447
1992	44.97
1993	44.29
1995	42.99
1996	45.54
1997	44.65
1998	42.91
1999	43.2
2000	46.11
2001	45.05
2002	44.93
2003	45.99
2004	45.44
2005	44.22
2011	46.43
2014	51.95
2015	52.27
2016	52.18
2017	52.8
2018	53.23
2019	53.72
2020	52.75
2021	52.81
2022	53.5