Year	% of total population ages 15+ (national estimate)
1960	53.16
1970	51.93
1973	61.58
1976	57.69
1980	55.98
1985	62.53
1986	62.37
1987	63.79
1988	63.61
1989	64.233
1990	64.35
1991	63.63
1992	68.943
1993	68.17
1995	66.473
1996	64.721
1997	65.636
1998	65.756
1999	66.378
2001	67.033
2002	67.904
2003	67.761
2004	68.293
2005	68.972
2006	68.642
2007	68.251
2008	68.031
2009	68.214
2011	65.681
2012	63.787
2013	63.723
2014	63.515
2015	63.806
2016	63.876
2017	64.183
2018	64.227
2019	64.672
2020	60.288
2021	62.269
2022	63.347
2023	62.754