Year	% of total population ages 15+ (national estimate)
1960	58.06
1970	52.9
1971	34.5
1974	36.95
1978	38.76
1979	59.74
1980	52.77
1981	59.44
1983	59.81
1985	60.06
1986	59.08
1987	58.93
1988	58.33
1989	57.29
1990	55.97
1991	57.14
1992	60.1
1993	58.39
1994	59.4
1995	60.24
1996	60.51
1997	60.3
1998	61.14
1999	60.84
2000	61.2
2001	60.7
2002	60.95
2003	61.6
2004	63
2005	63.72
2006	63.92
2007	63.46
2008	63.5
2009	62.68
2010	60.862
2011	59.931
2012	61.083
2013	60.737
2014	61.41
2015	59.977
2016	59.272
2019	56.915
2020	55.079
2021	54.28
2022	54.697