Year	% of cohort
1960	78.814921
1961	79.098913
1962	78.79708
1963	79.770503
1964	80.15031
1965	79.893559
1966	79.736629
1967	79.866348
1968	80.096559
1969	79.512563
1970	79.438807
1971	79.699903
1972	79.544779
1973	79.798054
1974	79.807436
1975	80.470083
1976	80.395368
1977	80.418144
1978	80.464891
1979	80.135213
1980	80.049373
1981	80.451867
1982	80.911216
1983	80.696719
1984	80.25913
1985	79.899812
1986	81.475595
1987	81.227382
1988	80.978841
1989	81.748773
1990	81.279882
1991	80.520398
1992	80.169897
1993	78.962445
1994	78.525366
1995	78.157876
1996	78.52725
1997	78.932092
1998	79.652133
1999	79.322595
2000	79.164902
2001	79.613162
2002	79.706788
2003	79.428009
2004	80.010316
2005	79.736006
2006	80.243473
2007	80.484418
2008	80.734597
2009	81.609867
2010	81.747195
2011	82.669185
2012	83.040312
2013	83.245714
2014	85.097482
2015	86.195375
2016	87.344462
2017	88.134262
2018	88.158823
2019	88.478151
2020	84.845894
2021	83.76859
2022	79.572532