Year	% of cohort
1970	76.9536437988281
1971	76.8803634643555
1972	77.8851013183594
1973	78.3108062744141
1974	79.2255325317383
1975	80.4390182495117
1976	80.0656204223633
1977	80.4659118652344
1978	79.9440383911133
1979	80.8902816772461
1980	81.5410690307617
1981	82.2996063232422
1982	82.36328125
1983	83.8366775512695
1984	84.6797714233398
1985	85.4165191650391
1986	85.3258666992188
1987	86.102668762207
1988	84.8511276245117
1989	86.5474166870117
1990	87.0767211914062
1991	86.3855972290039
1992	86.5223388671875
1993	86.373291015625
1994	86.3313064575195
1995	86.5690231323242
1996	86.5344009399414
1997	86.0119171142578
1998	86.1960983276367
1999	86.5978393554688
2000	86.7529220581055
2001	85.5169677734375
2002	84.5676116943359
2003	84.4801788330078
2004	83.1068267822266
2005	83.0383834838867
2006	84.3075637817383
2007	85.0427017211914
2008	85.6127777099609
2009	86.674072265625
2010	87.4564666748047
2011	87.0432434082031
2012	83.0124435424805
2013	82.233757019043
2014	81.9446182250977
2015	83.0999298095703
2016	83.6447982788086
2017	84.3566207885742
2018	85.3908996582031
2019	86.3142929077148
2020	86.4406204223633
2021	88.1493301391602