Year	% of people ages 15 and above
1975	93.8610687255859
1985	95.3799819946289
1996	96.7818069458008
2006	97.7896270751953
2007	97.8638916015625
2008	98.1635589599609
2009	98.2672271728516
2010	98.0727081298828
2011	98.3358993530273
2012	98.3959426879883
2013	98.3638687133789
2014	98.4359283447266
2015	98.5238723754883
2016	98.5614700317383
2017	98.61572265625
2018	98.703857421875
2019	98.7703475952148