Year	% of cohort
1971	66.2931365966797
1972	61.8971214294434
1973	47.753360748291
1974	67.1170883178711
1975	60.5713806152344
1976	51.6794509887695
1977	53.3179817199707
1978	60.1476097106934
1979	58.910041809082
1980	55.0541305541992
1982	59.4276313781738
1983	39.7782211303711
1984	55.1081504821777
1985	43.6122283935547
1986	50.1180000305176
1987	42.0429496765137
1988	46.8131294250488
1989	14.1700000762939
1990	67.1125717163086
1991	55.0709495544434
1992	67.3001098632812
1993	55.3737106323242
1994	64.7895431518555
1995	60.9391288757324
1996	66.3604507446289
1997	64.6226119995117
2000	84.1647720336914
2001	72.0334167480469
2002	68.4756393432617
2003	69.8001708984375
2009	60.4158592224121
2010	62.9836082458496
2011	67.5265274047852
2012	61.1456909179688
2013	62.7007904052734
2014	66.8319931030273
2015	57.5923881530762
2018	43.412540435791
2019	48.8868103027344
2020	64.9031982421875
2021	62.6687393188477