Year	% of cohort
1970	77.9803924560547
1971	77.9682922363281
1972	78.8884963989258
1973	79.6053619384766
1974	80.9831390380859
1975	82.3307876586914
1976	82.2329711914062
1977	82.5065536499023
1978	82.5701904296875
1979	82.9514389038086
1980	83.4678573608398
1981	83.8611068725586
1982	83.7484130859375
1983	85.9428634643555
1984	86.82470703125
1985	87.2227020263672
1986	87.2370529174805
1987	86.8491516113281
1988	85.9248886108398
1989	87.5409927368164
1990	88.1351089477539
1991	86.985481262207
1992	86.8305206298828
1993	86.5412368774414
1994	86.6276168823242
1995	86.7767181396484
1996	86.2918930053711
1997	85.3689804077148
1998	85.3119201660156
1999	85.6697006225586
2000	85.8064270019531
2001	84.4624481201172
2002	83.2702407836914
2003	83.6009902954102
2004	81.7011337280273
2005	81.5910415649414
2006	82.9006805419922
2007	83.7577667236328
2008	84.2774505615234
2009	85.3690490722656
2010	86.4741897583008
2011	85.6260986328125
2012	81.8462066650391
2013	81.8597183227539
2014	82.4644165039062
2015	82.85498046875
2016	84.0922164916992
2017	84.3292465209961
2018	85.1819076538086
2019	85.9301528930664
2020	86.3877868652344
2021	88.0114288330078