Year	% (national estimate)
1976	61.95
1985	64.4
1986	61.45
1987	63.61
1988	61.81
1989	59.4
1990	59.3
1991	58.72
1992	58.32
1993	55.37
1995	52.74
1996	52.74
1997	51.76
1998	51.18
1999	49.61
2016	34.09
2019	29.91
2021	28.94
2022	27.89