Year	% of cohort
1960	36.851289
1961	37.051377
1962	37.385462
1963	37.758305
1964	38.082852
1965	36.571732
1966	37.042223
1967	37.485166
1968	39.804688
1969	40.296971
1970	40.78304
1971	41.253795
1972	41.794066
1973	42.49903
1974	43.512806
1975	44.421432
1976	45.44201
1977	46.440745
1978	47.61047
1979	48.758653
1980	49.891042
1981	51.008802
1982	52.083979
1983	53.115307
1984	54.084513
1985	55.009067
1986	55.884334
1987	56.710148
1988	57.512481
1989	58.264163
1990	58.93452
1991	59.526142
1992	60.055848
1993	60.4863
1994	60.999954
1995	61.49416
1996	62.054506
1997	62.685989
1998	63.373572
1999	64.157
2000	65.010283
2001	65.798389
2002	66.790896
2003	67.713949
2004	68.590077
2005	69.518784
2006	70.378604
2007	71.159399
2008	71.904639
2009	72.576925
2010	73.166806
2011	73.677392
2012	74.076447
2013	74.35983
2014	74.626744
2015	74.861404
2016	75.143887
2017	75.528483
2018	76.006774
2019	76.478514
2020	75.572251
2021	69.983461
2022	71.128889