Year	% of total population ages 15+ (national estimate)
1960	79.7
1965	74.4
1970	67.8
1975	66.81
1980	65.47
1985	63.79
1988	58.47
1989	58.7
1990	56.614
1991	56.998
1992	55.99
1993	52.153
1994	54.649
1995	54.125
1996	53.734
1997	52.553
1998	52.796
1999	52.7
2000	49.948
2001	49.822
2002	49.577
2003	48.331
2004	46.306
2005	46.431
2006	46.272
2007	46.23
2008	46.886
2009	47.88
2010	48.804
2011	49.864
2012	49.958
2013	50.84
2014	50.512
2015	51.3
2016	52
2017	52.832
2018	53.212
2019	52.951
2020	49.334
2021	51.359
2022	53.055
2023	53.313