Year	% of total population ages 15+ (national estimate)
1967	32.54
1979	37.62
1980	38.92
1981	38.1
1983	36.73
1985	40.15
1986	36.62
1987	36.9
1988	37.28
1989	37.16
1990	37.17
1993	36.09
1994	46.99
1995	48.84
1996	47.98
1997	47.85
1998	47.73
1999	38.42
2000	49.683
2001	50.328
2002	50.368
2003	50.322
2004	49.034
2005	49.073
2006	49.109
2007	49.853
2008	50.046
2009	50.227
2010	50.771
2011	51.435
2012	52.57
2013	54.12
2014	55.262
2015	55.741
2016	56.73
2017	57.902
2018	60.071
2019	61.497
2020	62.271
2021	63.136
2022	64.495
2023	65.645