Year	% of cohort
1960	78.938518
1961	79.858597
1962	79.783318
1963	79.967345
1964	80.676567
1965	80.586022
1966	80.861623
1967	81.167164
1968	81.181852
1969	80.801521
1970	81.133978
1971	81.782698
1972	82.150557
1973	82.601261
1974	82.773362
1975	82.884257
1976	83.570016
1977	83.783289
1978	84.358945
1979	84.585958
1980	84.535243
1981	85.089318
1982	85.147112
1983	85.150104
1984	85.854794
1985	86.236984
1986	86.74017
1987	87.292016
1988	87.768307
1989	88.030243
1990	88.008094
1991	88.261688
1992	88.391451
1993	88.304514
1994	88.747121
1995	89.115058
1996	89.219384
1997	89.877485
1998	90.036661
1999	89.97631
2000	90.210552
2001	90.534841
2002	90.956781
2003	90.531312
2004	90.987929
2005	91.167247
2006	91.701936
2007	91.636882
2008	91.803763
2009	91.612205
2010	91.690105
2011	91.923139
2012	92.096221
2013	92.268483
2014	92.17173
2015	92.415348
2016	92.618877
2017	92.833073
2018	92.823711
2019	93.073777
2020	93.234139
2021	93.190064
2022	93.368196