Year	% of cohort
1977	14.1273002624512
1978	30.4010200500488
1993	80.6464233398438
1997	85.1650924682617
1998	86.3742370605469
1999	88.9465866088867
2000	89.2107696533203
2005	91.269416809082
2008	92.6178512573242
2009	90.8349380493164
2010	94.7374801635742
2011	94.9175567626953
2016	92.5714492797852
2017	86.7777633666992