Year	% of people ages 15 and above
1974	78.7179489135742
1975	78.7367935180664
1976	79.087272644043
1977	79.4894790649414
1978	79.9269866943359
1979	80.3227233886719
1980	80.6362915039062
1981	81.0647583007812
1982	81.446418762207
1983	81.8425598144531
1984	82.2144012451172
1985	82.5733032226562
1986	82.9252777099609
1987	83.2176132202148
1988	83.7077102661133
1989	84.1495132446289
1990	84.4631271362305
1991	85.0656585693359
1992	85.6455993652344
1993	86.2484512329102
1994	86.8230667114258
1995	87.4062194824219
1996	87.7244491577148
1997	88.0444717407227
1998	88.399040222168
1999	88.7034912109375
2000	88.9560012817383
2001	89.1479721069336
2002	89.2953414916992
2003	90.0865097045898
2004	90.0280075073242
2005	90.5111389160156
2006	90.4645767211914
2007	91.075813293457
2008	91.327392578125
2009	91.5974731445312
2010	91.5873489379883
2011	92.1557464599609
2012	92.3983764648438
2013	92.4446334838867
2014	92.8893890380859
2015	93.0500106811523
2016	93.5284194946289
2017	93.5947265625
2018	93.7266693115234
2019	94.1739807128906
2020	94.1992492675781
2021	94.4546508789062
2022	94.6001205444336