Year	% of cohort
1970	77.2830276489258
1971	69.0736465454102
1972	71.4994812011719
1973	70.7427215576172
1974	67.8261871337891
1975	67.0792694091797
1976	72.8468170166016
1982	92.9418334960938
1996	97.9734497070312
2010	97.9340667724609
2011	98.6675415039062
2013	99.5310516357422
2014	99.5993118286133
2015	99.4100799560547
2016	99.5453414916992
2017	99.678092956543
2018	99.7367782592773
2019	99.1959915161133
2020	99.5597763061523