Year	% of total population ages 15+ (national estimate)
1960	55.46
1971	53.14
1978	60.34
1981	59.61
1986	60.3
1991	65.57
2001	67.95
2011	66.4
2014	65.987
2017	62.728
2018	65.395
2019	64.184
2020	65.216
2021	63.75
2022	62.788