Year	% of total population ages 15+ (national estimate)
1976	58.77
1978	81.61
1979	78.97
1980	82.15
1982	83.13
1984	82.06
1987	81.65
1988	82.01
1989	82.46
1990	81.95
1994	74.36
1996	74.67
1997	74.78
1998	73.6
1999	72.16
2000	72.66
2001	73.17
2003	72.98
2004	73.39
2005	73.68
2006	72.95
2007	73.58
2008	73.4
2009	72.75
2010	71.593
2011	73.28
2012	73
2013	70.272
2014	69.832
2015	69.235
2016	68.25
2017	67.501
2018	67.799
2019	66.964
2020	67.021
2021	66.938
2022	67.538
2023	68.239