Year	% of total population ages 15+ (national estimate)
1960	59.4
1961	59.3
1962	58.8
1963	58.7
1964	58.7
1965	58.9
1966	59.2
1967	59.6
1968	59.6
1969	60.1
1970	60.4
1971	60.2
1972	60.4
1973	60.8
1974	61.3
1975	61.2
1976	61.6
1977	62.3
1978	63.2
1979	63.7
1980	63.8
1981	63.9
1982	64
1983	64
1984	64.4
1985	64.8
1986	65.3
1987	65.6
1988	65.9
1989	66.5
1990	66.5
1991	66.2
1992	66.4
1993	66.3
1994	66.658
1995	66.718
1996	66.868
1997	67.204
1998	67.086
1999	67.083
2000	67.074
2001	66.824
2002	66.582
2003	66.244
2004	65.994
2005	66.047
2006	66.179
2007	66.04
2008	65.994
2009	65.37
2010	64.706
2011	64.109
2012	63.701
2013	63.249
2014	62.885
2015	62.651
2016	62.786
2017	62.851
2018	62.871
2019	63.1
2020	61.746
2021	61.659
2022	62.236
2023	62.604