Year	% of total population ages 15+ (national estimate)
1964	41.32
1980	37.31
1987	53.36
1989	45.84
1990	55.55
1992	52.38
1993	49.32
1994	48.77
1995	47.98
1999	46.61
2009	62.57
2010	61.89
2011	61.95
2012	61.51
2013	61.65
2014	62.92
2015	59.96
2016	56.115