Year	% of people ages 15 and above
1976	65.6910018920898
1977	65.8766632080078
1978	66.9680633544922
1979	68.1839294433594
1980	68.7624588012695
1981	70.3761291503906
1982	70.9697113037109
1983	72.248649597168
1984	73.2317276000977
1985	74.1679763793945
1986	75.0007171630859
1987	76.1742477416992
1988	79.9597702026367
1989	80.6075134277344
1990	80.4611511230469
1991	81.7051086425781
1992	82.2235717773438
1993	82.6898422241211
1994	83.2462005615234
1995	83.797721862793
1996	84.2900390625
1997	89.2774887084961
1998	89.6400833129883
1999	89.9609527587891
2000	90.2488174438477
2001	90.6438064575195
2002	90.9889221191406
2003	91.3519668579102
2004	91.6966705322266
2005	92.0126571655273
2006	92.4162826538086
2007	93.4407424926758
2008	93.7255783081055
2009	94.0279922485352
2010	94.124641418457
2011	93.8310394287109
2012	94.0228500366211
2013	94.1243209838867
2014	94.6579895019531
2015	94.869499206543
2016	95.0339736938477
2017	95.2058792114258
2018	95.3079376220703
2019	95.7082214355469
2020	96.0015487670898
2021	96.0377426147461