Year	% of cohort
1970	78.1733322143555
1971	78.162467956543
1972	79.0731506347656
1973	79.79345703125
1974	81.1458969116211
1975	82.4784164428711
1976	82.3829498291016
1977	82.6544876098633
1978	82.7155914306641
1979	83.0984268188477
1980	83.6126098632812
1981	84.0004501342773
1982	83.8860168457031
1983	86.0613632202148
1984	86.9383773803711
1985	87.3248901367188
1986	87.3408889770508
1987	86.9599685668945
1988	86.047492980957
1989	87.6486587524414
1990	88.2378005981445
1991	87.1021575927734
1992	86.9534530639648
1993	86.6733169555664
1994	86.7656707763672
1995	86.9205169677734
1996	86.4538116455078
1997	85.5521697998047
1998	85.5025787353516
1999	85.8740234375
2000	85.9636001586914
2001	84.6475372314453
2002	83.4732818603516
2003	83.7950897216797
2004	81.9265518188477
2005	81.8213882446289
2006	83.1273574829102
2007	83.9629364013672
2008	84.4697036743164
2009	85.5398864746094
2010	86.6275482177734
2011	85.8368988037109
2012	82.0266265869141
2013	82.0712203979492
2014	82.6679611206055
2015	83.0862731933594
2016	84.3119201660156
2017	84.5269165039062
2018	85.3398818969727
2019	86.1101913452148
2020	86.5620574951172
2021	88.1530532836914