Year	% of cohort
1970	66.5682220458984
1971	77.4007110595703
1972	78.0565567016602
1973	80.0166625976562
1974	77.0815505981445
1975	75.4038314819336
1976	77.0087738037109
1977	76.7331008911133
1978	77.4772491455078
1979	78.998046875
1980	81.0933685302734
1981	74.9956893920898
1982	75.4573287963867
1983	78.8619079589844
1984	80.2889404296875
1985	77.5541381835938
1986	85.5071792602539
1987	77.6229095458984
1988	83.0181732177734
1989	81.2424163818359
1990	78.1026992797852
1991	80.4596710205078
1992	79.60546875
1993	81.5466537475586
1994	88.7719497680664
1995	76.1928329467773
1996	78.8494720458984
1997	83.5005493164062
1998	86.9074172973633
1999	88.1292419433594
2000	79.2658920288086
2001	69.2345809936523
2002	79.9692001342773
2004	87.3234329223633
2005	96.8809585571289
2006	85.9066162109375
2009	97.4186019897461
2012	90.7468185424805
2013	95.4190902709961
2014	95.6416778564453
2015	97.2263870239258
2016	95.1682815551758
2018	98.1645736694336