Year	% of cohort
1970	48.5395202636719
1971	44.884838104248
1972	51.4072303771973
1973	49.2208290100098
1974	46.9621391296387
1975	54.5218696594238
1976	53.7641105651855
1977	56.9031715393066
1980	58.3582305908203
1981	58.3404197692871
1982	61.0412292480469
1983	60.7775382995605
1984	61.3223114013672
1985	59.1787490844727
1986	61.282470703125
1987	64.3876190185547
1988	65.5601272583008
1989	66.4793472290039
1990	70.4546585083008
1991	74.0452194213867
1992	76.1981811523438
1993	71.2605361938477
1994	72.8739318847656
1995	78.3895568847656
1997	78.1131591796875
1998	79.3639526367188
1999	78.1169586181641
2002	81.455940246582
2003	81.2474365234375
2004	87.7129516601562
2005	80.9920501708984
2006	83.5863265991211
2007	83.6718902587891
2008	82.2742919921875
2009	85.5383071899414
2010	83.7920608520508
2011	86.7446517944336
2021	98.6495590209961