Year	% of total population ages 15+ (national estimate)
1964	52.59
1973	49.77
1980	47.5
1985	49.43
1986	42.3
1987	44
1989	61.17
1993	71.28
1996	45.9
2000	64.85
2001	67.635
2002	66.596
2003	67.436
2004	66.686
2005	65.339
2007	63.887
2008	64.158
2009	66.954
2010	67.079
2011	67.514
2012	68.072
2013	67.273
2014	66.991
2015	67.02
2016	66.418
2017	66.013
2018	65.237
2019	64.322
2020	63.415
2021	64.33
2022	63.159
2023	63.764