Year	% of cohort
1971	74.8266906738281
1973	71.4009170532227
1974	79.3889923095703
1975	93.2966995239258
1976	78.4459686279297
1977	74.3114929199219
1978	77.6899337768555
1979	75.2086029052734
1980	77.665901184082
1991	80.4912490844727
2000	66.247932434082
2001	90.5160293579102
2002	63.286319732666
2008	78.4208831787109
2012	88.1182479858398
2013	89.7566604614258
2016	90.2174377441406
2017	86.3419876098633
2021	92.4319229125977