Year	% of cohort
1971	71.7060775756836
1973	68.9587936401367
1974	77.1209411621094
1975	91.9728698730469
1976	76.0088729858398
1977	71.12548828125
1978	74.6807098388672
1979	73.1770477294922
1980	76.2632904052734
1991	78.1037216186523
2000	59.4240417480469
2001	88.992431640625
2002	59.4630088806152
2008	72.2302322387695
2012	78.9039611816406
2013	83.7136611938477
2016	84.9802703857422
2017	81.5872802734375
2021	88.4221115112305