Year	% of total population ages 15+ (national estimate)
1961	54.13
1971	56.63
1975	31.46
1978	57.71
1979	59.41
1980	59.16
1990	63.74
1991	61.91
1992	59.69
1993	60.39
1994	61.2
1995	60.06
1996	58.5
1997	58.68
1998	61.1
1999	60.26
2000	60
2001	60.3
2002	58.59
2003	61
2004	59.55
2005	59.7
2006	60.3
2007	60.88
2008	62.71
2009	62.76
2010	61.093
2011	61.179
2012	61.774
2013	62.174
2014	60.928
2015	60.176
2016	60.568
2017	60.209
2018	59.824
2019	60.745
2020	59.245
2021	59.581
2022	60.488