Year % (national estimate) 1985 57.47 1986 57.84 1987 58.32 1988 58.59 1989 58.8 1990 59.13 1991 60.29 1992 61.29 1993 61.58 1995 64.01 1996 63.92 1997 64.5 1998 64.94 2015 90.64 2016 90.45 2018 65.85 2019 66.35 2020 65.58 2021 66.67 2022 67