Year	% of cohort
1971	70.836067199707
1972	65.3305892944336
1978	84.7458419799805
1979	81.0583267211914
1980	82.1712036132812
1981	83.4068908691406
1982	84.9130477905273
1983	82.0273895263672
1984	82.1257781982422
1985	80.4853363037109
1987	84.731559753418
1988	81.218132019043
1989	84.9674377441406
1991	79.3561477661133
1993	83.1134719848633
1995	75.7066802978516
1996	80.8928298950195
1997	83.6405487060547
2000	62.887020111084
2001	59.1616287231445
2002	71.4628829956055
2003	72.2114334106445
2004	63.748291015625
2005	53.488941192627
2007	58.4184188842773
2008	57.5973281860352
2009	59.5713195800781
2010	59.1951293945312
2011	61.3669090270996
2012	57.4079513549805
2013	65.5232162475586
2014	58.1751708984375
2019	69.3999099731445
2020	61.4873085021973
2021	60.8659706115723