Year	% of total population ages 15+ (national estimate)
1961	64.1
1966	63.56
1971	64.02
1975	65.26
1976	64.21
1979	62.45
1980	63.8
1981	65.97
1982	64.79
1983	65.17
1984	66.2
1985	64.85
1986	65.09
1987	64.76
1988	64.49
1989	63.55
1990	62.99
1991	63.44
1992	62.28
1993	62.45
1994	62.49
1995	61.97
1996	61.78
1997	61.77
1998	62
1999	61.3
2000	60.68
2001	61.43
2002	61.83
2003	61.35
2004	61.27
2005	60.99
2006	61.26
2007	61.22
2008	60.88
2009	60.77
2010	59.59
2011	60.073
2012	60.501
2013	61.217
2014	61.057
2015	61.144
2016	61.052
2017	61.121
2018	61.275
2019	60.672
2020	59.712
2021	59.375
2022	58.213
2023	57.329