Year	% of cohort
1972	52.6655502319336
1973	48.5848083496094
1974	46.8344306945801
1975	55.0339317321777
1976	53.4632987976074
1977	57.4420890808105
1980	58.5001487731934
1981	58.888370513916
1982	61.8001899719238
1983	60.7252197265625
1984	61.0018310546875
1985	58.9130516052246
1986	61.1485786437988
1987	63.8331985473633
1988	64.3031005859375
1989	65.6147079467773
1990	69.1123733520508
1991	73.3085021972656
1992	74.7624588012695
1993	69.7191009521484
1994	71.0482406616211
1995	77.314338684082
1997	76.0270690917969
1998	79.6709976196289
1999	76.1661605834961
2002	80.0547637939453
2003	79.3612823486328
2004	85.8366088867188
2005	79.6298904418945
2006	82.8047714233398
2007	82.4212493896484
2008	80.8439636230469
2009	84.6021881103516
2010	81.6078796386719
2011	85.4349975585938
2021	98.5440368652344