Year	% of total population ages 15+ (national estimate)
1961	30.14
1974	51.03
1987	54.8
1991	57.94
1992	60.81
1995	59.45
1998	63.8
1999	65.88
2000	64.38
2001	62.5
2002	60.1
2004	59.59
2005	61.667
2006	59.856
2007	58.958
2008	59.576
2009	60.807
2010	61.915
2011	59.727
2012	58.4
2013	62.661
2014	64.152
2015	64.092
2016	63.323
2017	64.359
2018	66.746
2019	64.592
2020	60.286
2021	62.616
2022	63.915
2023	57.363