Year	% of cohort
1977	79.0526275634766
1978	73.6476135253906
1979	73.7807312011719
1980	58.4341697692871
1981	73.8854293823242
1982	73.3627166748047
1983	72.9972991943359
1984	72.5065994262695
1985	72.3224563598633
1986	73.2388763427734
2016	99.616813659668
2017	99.8937911987305
2018	99.6394500732422
2019	99.460319519043
2020	99.5588684082031
2021	99.8011703491211