Year	% of cohort
1972	95.1431274414062
1973	94.6110534667969
1974	95.7854995727539
1975	95.2368316650391
1976	97.0869369506836
1977	89.0506896972656
1978	83.0639724731445
1979	91.3955612182617
1981	87.5055770874023
1983	94.7754898071289
2008	98.5436096191406
2016	99.8290328979492
2017	99.422477722168
2018	99.2545928955078
2019	99.3142318725586
2020	99.4717025756836