Year	% of cohort
1960	68.502255
1961	69.895702
1962	71.407425
1963	72.678809
1964	73.388473
1965	74.299909
1966	74.579048
1967	75.30232
1968	75.500406
1969	76.266175
1970	76.559595
1971	77.237026
1972	77.43946
1973	77.882308
1974	78.70344
1975	79.576214
1976	80.277694
1977	80.40711
1978	80.562493
1979	80.595933
1980	80.899221
1981	81.397097
1982	81.99543
1983	82.659217
1984	82.868391
1985	83.776614
1986	84.216484
1987	84.932832
1988	84.915981
1989	85.254166
1990	85.583649
1991	86.413684
1992	86.83734
1993	87.1395
1994	87.183728
1995	87.345492
1996	88.104827
1997	88.925819
1998	89.753552
1999	90.177187
2000	90.770108
2001	90.981454
2002	91.236426
2003	91.46967
2004	91.814238
2005	92.310686
2006	92.509041
2007	92.634934
2008	92.668477
2009	92.770338
2010	92.840638
2011	93.013831
2012	93.169375
2013	93.29059
2014	93.423894
2015	93.609161
2016	93.798909
2017	93.992502
2018	94.170743
2019	94.381415
2020	94.318412
2021	94.486041
2022	94.598562