Year	% of cohort
1960	65.759851
1961	66.413751
1962	65.655784
1963	65.096468
1964	66.713232
1965	66.134091
1966	66.869366
1967	66.806798
1968	66.887266
1969	66.136898
1970	68.188887
1971	68.018068
1972	68.28772
1973	68.817365
1974	69.060024
1975	69.198574
1976	69.229928
1977	70.201145
1978	70.362417
1979	70.697887
1980	70.962348
1981	71.423978
1982	71.792424
1983	71.986119
1984	72.413928
1985	72.70352
1986	73.118168
1987	73.986072
1988	74.426119
1989	74.597302
1990	75.169334
1991	75.395151
1992	75.840317
1993	76.05658
1994	76.615129
1995	77.100414
1996	77.609396
1997	78.423864
1998	78.861871
1999	79.324514
2000	79.726204
2001	79.905747
2002	80.244341
2003	80.422684
2004	81.51247
2005	81.601283
2006	81.98822
2007	82.276489
2008	82.54428
2009	82.620291
2010	82.919862
2011	83.352109
2012	83.581679
2013	83.980509
2014	84.545044
2015	84.355918
2016	84.700792
2017	84.992688
2018	85.13904
2019	85.336139
2020	85.594679
2021	85.836457
2022	85.982675