Year	% of cohort
1971	88.8689804077148
1972	91.9695281982422
1973	85.4073486328125
1974	85.1494522094727
1975	88.7740707397461
1976	85.5196914672852
1977	84.1993865966797
1978	87.8441619873047
1979	85.8760986328125
1980	86.9645385742188
1981	90.5982437133789
1982	90.5633392333984
1983	92.6335906982422
1984	95.0990524291992
1985	95.9721603393555
1988	92.4574203491211
1989	89.4598617553711
1990	95.8253707885742
1991	93.6502685546875
1992	91.8149871826172
1993	92.253662109375
1994	89.8343505859375
1995	90.9343566894531
1996	93.5229110717773
1997	87.3601303100586
1998	90.6947021484375
1999	91.7723617553711
2000	92.0764312744141
2001	92.3779678344727
2020	73.6842575073242
2021	90.5527801513672
2022	92.2212066650391