Year	% (national estimate)
1976	64.23
1985	66.6
1986	61.01
1987	65.31
1988	65.39
1989	62.45
1990	63.02
1991	62.4
1992	62.31
1993	60.23
1995	57.53
1996	57.41
1997	55.76
1998	55.01
1999	52.57
2016	38.48
2019	33.98
2021	31.73
2022	30.4