Year	% of total population ages 15+ (national estimate)
1982	77.77944818955856
1990	76.45303729221118
2000	71.36920583212627
2001	72.53728366963114
2002	71.83142342698399
2003	71.26642961629422
2004	70.92194328081631
2005	70.92198647605657
2006	70.49418655405087
2007	70.33468012264598
2008	69.93694289382721
2009	69.79497630238971
2010	69.1304102569415
2011	68.93302990879941
2012	68.69490061516571
2013	68.62479966402445
2014	68.62896637741002
2015	68.70904574615095
2016	68.86490032424086