Year	% of cohort
1960	80.575366
1961	81.471712
1962	81.069431
1963	81.009305
1964	82.015142
1965	82.001501
1966	82.449192
1967	82.607637
1968	82.729212
1969	82.417139
1970	83.439219
1971	83.560162
1972	83.737336
1973	84.255835
1974	84.702756
1975	84.886221
1976	85.300012
1977	85.945004
1978	86.109726
1979	86.382091
1980	86.596452
1981	86.889358
1982	87.198295
1983	87.277452
1984	87.751648
1985	87.968509
1986	88.15605
1987	88.625159
1988	88.756524
1989	88.920727
1990	89.267233
1991	89.350249
1992	89.572809
1993	89.518066
1994	89.823763
1995	89.943997
1996	90.088847
1997	90.386624
1998	90.468935
1999	90.5974
2000	90.799666
2001	90.806951
2002	90.940465
2003	90.98773
2004	91.272975
2005	91.431845
2006	91.50321
2007	91.681771
2008	91.656166
2009	91.668992
2010	91.841463
2011	91.977456
2012	92.081458
2013	92.162555
2014	92.328574
2015	92.300907
2016	92.345211
2017	92.307415
2018	92.339717
2019	92.444753
2020	92.513503
2021	92.702538
2022	92.776756