Year	% of cohort
1960	24.211771
1961	24.655161
1962	25.08458
1963	25.596265
1964	25.977267
1965	26.513071
1966	27.119155
1967	27.633936
1968	28.069061
1969	28.570986
1970	29.235058
1971	29.608108
1972	30.136835
1973	30.721739
1974	31.129527
1975	31.685415
1976	32.422547
1977	33.064143
1978	32.867156
1979	34.281241
1980	35.009303
1981	31.387711
1982	36.522793
1983	37.248732
1984	37.837725
1985	38.666088
1986	39.235044
1987	40.060436
1988	41.128851
1989	41.718222
1990	42.538958
1991	43.396942
1992	44.42089
1993	45.427662
1994	47.076267
1995	48.013794
1996	48.773728
1997	48.498915
1998	49.040623
1999	49.202864
2000	49.413562
2001	49.370954
2002	49.4199
2003	50.583441
2004	51.441398
2005	51.651512
2006	52.945234
2007	53.925987
2008	55.323473
2009	55.430557
2010	56.371818
2011	57.590114
2012	58.089005
2013	58.485013
2014	58.149657
2015	58.647418
2016	59.205015
2017	58.943215
2018	59.022761
2019	59.89967
2020	56.510508
2021	55.422113
2022	56.844206