Year	% of cohort
1960	21.190631
1961	21.819029
1962	22.397017
1963	22.973204
1964	23.546267
1965	24.103442
1966	24.752287
1967	25.357858
1968	25.990229
1969	26.609436
1970	27.291861
1971	27.971612
1972	28.682141
1973	29.412834
1974	30.119075
1975	30.81302
1976	31.518061
1977	32.250609
1978	31.569555
1979	30.610007
1980	31.3726
1981	32.13552
1982	29.783047
1983	30.499164
1984	25.326485
1985	25.718862
1986	32.480643
1987	33.184889
1988	37.945847
1989	39.463644
1990	40.567806
1991	41.661601
1992	43.356983
1993	47.185992
1994	48.310798
1995	49.142429
1996	50.23225
1997	50.73025
1998	49.985859
1999	52.486077
2000	53.334998
2001	54.083719
2002	54.554813
2003	56.130087
2004	57.009717
2005	57.754769
2006	58.592334
2007	59.628489
2008	60.623706
2009	61.219357
2010	62.041411
2011	62.975062
2012	63.811009
2013	64.643019
2014	65.042186
2015	65.49806
2016	66.349797
2017	67.88252
2018	68.448803
2019	68.843426
2020	65.799993
2021	65.217377
2022	66.852465