Year	% of cohort
1971	79.0889587402344
1973	72.0012664794922
1974	87.2902908325195
1975	98.4275970458984
1976	82.3556289672852
1977	78.2113723754883
1978	78.9620895385742
1991	81.3865203857422
2000	67.2309112548828
2001	94.0916137695312
2002	61.8470611572266
2008	80.271842956543
2012	88.6106033325195
2013	90.4943618774414
2016	91.4826202392578
2017	85.9753036499023
2021	95.5411224365234