Year	% of cohort
1960	63.831946
1961	64.910348
1962	65.348897
1963	65.889871
1964	66.17947
1965	67.288149
1966	67.991248
1967	69.149718
1968	69.440274
1969	69.977955
1970	71.442278
1971	72.084662
1972	71.873174
1973	71.997287
1974	72.023597
1975	72.381606
1976	72.681437
1977	72.599966
1978	74.014249
1979	75.676955
1980	76.574572
1981	77.509386
1982	78.199809
1983	78.949742
1984	80.167992
1985	80.857226
1986	81.781881
1987	82.549101
1988	83.188442
1989	81.780692
1990	84.138982
1991	84.355134
1992	84.881972
1993	85.285186
1994	85.390998
1995	85.365226
1996	85.342383
1997	85.530725
1998	85.546773
1999	85.867913
2000	82.920614
2001	83.687495
2002	84.061294
2003	84.365335
2004	74.465649
2005	85.246126
2006	85.746011
2007	85.942227
2008	86.124639
2009	82.068752
2010	86.431443
2011	86.652608
2012	87.06306
2013	87.596827
2014	87.807341
2015	87.985826
2016	88.383989
2017	88.313297
2018	88.557164
2019	88.830712
2020	89.236205
2021	88.918591
2022	89.380769