Year	% of people ages 15 and above
1976	68.7402877807617
1977	68.9313888549805
1978	69.9041366577148
1979	70.9724502563477
1980	71.5033187866211
1981	72.8753890991211
1982	73.4478988647461
1983	74.578498840332
1984	75.5839767456055
1985	76.4373321533203
1986	77.2683715820312
1987	78.1140289306641
1988	81.4084625244141
1989	82.0005111694336
1990	81.9450302124023
1991	83.0566329956055
1992	83.5829162597656
1993	84.0818786621094
1994	84.5628128051758
1995	85.047248840332
1996	85.5018768310547
1997	89.8137893676758
1998	90.2042388916016
1999	90.5233993530273
2000	90.8406982421875
2001	91.1814193725586
2002	91.4581604003906
2003	91.8690185546875
2004	92.1204071044922
2005	92.4441070556641
2006	92.732551574707
2007	93.5746765136719
2008	93.8507232666016
2009	93.9343719482422
2010	94.1353988647461
2011	94.385871887207
2012	94.83447265625
2013	94.6060104370117
2014	95.3026428222656
2015	95.0711364746094
2016	95.6491088867188
2017	95.6296005249023
2018	95.4207229614258
2019	95.7350616455078
2020	95.956916809082
2021	95.9116668701172
2022	95.9559707641602