Year	% of cohort
1960	48.526238
1961	50.608011
1962	52.52269
1963	54.696014
1964	57.048119
1965	59.017277
1966	61.244051
1967	63.28613
1968	65.398029
1969	66.717571
1970	68.543281
1971	70.562408
1972	71.684646
1973	72.875194
1974	73.765547
1975	74.818558
1976	75.847331
1977	76.132441
1978	77.027261
1979	77.343727
1980	78.248263
1981	78.397937
1982	79.159126
1983	79.306818
1984	79.419056
1985	79.409225
1986	79.506536
1987	79.546643
1988	79.500563
1989	80.210255
1990	80.250918
1991	79.968854
1992	80.720876
1993	81.330915
1994	81.82862
1995	82.342921
1996	83.834118
1997	84.345783
1998	84.595047
1999	84.620643
2000	86.010189
2001	86.255087
2002	86.616617
2003	86.639676
2004	87.11862
2005	87.94052
2006	88.236097
2007	89.113267
2008	89.428723
2009	89.59847
2010	89.567925
2011	89.721684
2012	90.094468
2013	90.544874
2014	90.789683
2015	90.807767
2016	91.100883
2017	91.170505
2018	91.216093
2019	91.342486
2020	90.909328
2021	90.602161
2022	90.986158