Year	% of total population ages 15+ (national estimate)
1976	52.3
1987	65.43
2004	49.43
2006	75.2
2007	82.2
2009	59.35
2010	65.29
2013	77.224
2014	70.617
2015	70.561
2016	62.003
2017	69.159
2018	63.748
2020	65.916