Year	% of people ages 15 and above
1976	63.6944694519043
1977	63.8595085144043
1978	65.0514678955078
1979	66.3884429931641
1980	67.0375289916992
1981	68.7582092285156
1982	69.4256820678711
1983	70.8339767456055
1984	71.9103622436523
1985	72.9343719482422
1986	73.8549118041992
1987	75.0931930541992
1988	79.3136215209961
1989	80.0132369995117
1990	79.8271713256836
1991	81.2028884887695
1992	81.7608337402344
1993	82.2653121948242
1994	82.8456497192383
1995	83.4269485473633
1996	83.9453201293945
1997	89.5268325805664
1998	89.9064483642578
1999	90.2040023803711
2000	90.5106201171875
2001	90.9216690063477
2002	91.2595520019531
2003	91.5990295410156
2004	91.9295196533203
2005	92.2266998291016
2006	92.638069152832
2007	93.751106262207
2008	94.0106811523438
2009	94.3140487670898
2010	94.4905471801758
2011	94.231330871582
2012	94.405143737793
2013	94.5015029907227
2014	94.9556732177734
2015	95.1597595214844
2016	95.321418762207
2017	95.4862823486328
2018	95.5852584838867
2019	95.963508605957
2020	96.2715911865234
2021	96.2973709106445