Year	% of cohort
1971	69.7882537841797
1973	70.6609725952148
1974	70.3871002197266
1975	87.113410949707
1976	73.6524963378906
1977	69.5814895629883
1978	76.1533584594727
1991	79.4115600585938
2000	65.1747436523438
2001	86.7631683349609
2002	64.7431335449219
2008	76.5212783813477
2012	87.6139526367188
2013	88.9976806640625
2016	88.938117980957
2017	86.7206115722656
2021	89.3072204589844