Year	% of cohort
1979	91.9901885986328
1980	92.3770599365234
1983	92.8647003173828
1984	93.208740234375
1985	92.5561828613281
1991	86.9407272338867
1994	85.0103302001953
1995	87.0779800415039
1996	91.3079223632812
1997	90.117073059082
1998	90.2113189697266
1999	89.1137390136719
2000	87.3504333496094
2001	83.8003616333008
2003	97.2249374389648
2008	96.2315902709961
2011	96.1191864013672
2012	98.7285537719727
2015	91.8855361938477
2019	79.0405883789062