Year	% of total population ages 15+ (national estimate)
1962	57.06
1972	55.28
1982	55.42
1989	67.68
1990	65.54
1991	63.78
1992	65.14
1993	67.56
1994	68.12
1995	76.9
1996	71.2
1998	67.028
1999	65.722
2000	69.1
2001	68.177
2002	68.749
2003	67.598
2004	71.373
2005	70.279
2006	67.047
2007	68.816
2008	69.302
2009	69.623
2010	67.738
2011	67.917
2012	71.277
2013	69.867
2014	67.955
2015	67.926
2016	69.966
2017	71.039
2018	71.868
2019	72.392
2020	70.117
2021	71.919
2022	70.58
2023	70.751