Year	% of cohort
1983	89.94873046875
1987	83.7692031860352
2000	85.2616424560547
2001	86.6447677612305
2008	85.4428024291992
2010	86.4050903320312
2012	89.9405364990234
2013	94.449836730957
2016	94.5769119262695
2017	96.3661804199219
2018	94.1112670898438
2019	86.5337829589844