Year	% of cohort
1960	60.688491
1961	62.302198
1962	63.436297
1963	64.974323
1964	66.412907
1965	67.850618
1966	69.222053
1967	70.38299
1968	71.702518
1969	72.970069
1970	74.07526
1971	75.116303
1972	76.183752
1973	76.989433
1974	77.774727
1975	78.52461
1976	78.991389
1977	79.562693
1978	79.890156
1979	80.278776
1980	81.801749
1981	82.289907
1982	82.853298
1983	83.309679
1984	83.648102
1985	83.847349
1986	84.274978
1987	84.818046
1988	85.334864
1989	85.673224
1990	86.08986
1991	86.337436
1992	86.728729
1993	86.927155
1994	87.098379
1995	87.414295
1996	87.68735
1997	86.950607
1998	88.034345
1999	88.244531
2000	88.478474
2001	88.702437
2002	88.931823
2003	89.207822
2004	89.429396
2005	89.720696
2006	89.951919
2007	90.489027
2008	90.674431
2009	90.78698
2010	90.915722
2011	91.017269
2012	90.957096
2013	91.074404
2014	91.354952
2015	91.512091
2016	91.693973
2017	91.825147
2018	91.939293
2019	91.975256
2020	90.241719
2021	89.363323
2022	89.707203