Year	% of cohort
1960	28.197536
1961	28.714632
1962	29.117168
1963	29.78282
1964	30.359462
1965	30.951494
1966	31.312945
1967	32.073096
1968	32.557639
1969	33.126754
1970	33.736064
1971	34.425951
1972	35.219401
1973	35.717694
1974	36.696757
1975	37.20742
1976	37.976103
1977	38.154547
1978	38.356375
1979	39.760666
1980	40.550669
1981	40.968932
1982	42.195872
1983	42.785724
1984	43.587488
1985	44.629912
1986	45.249295
1987	46.301336
1988	46.929177
1989	47.894961
1990	48.995129
1991	50.597534
1992	52.053402
1993	53.496296
1994	54.909325
1995	56.208222
1996	56.89465
1997	56.783703
1998	57.454998
1999	57.774835
2000	57.338307
2001	57.178053
2002	56.673386
2003	56.913066
2004	57.474664
2005	57.970657
2006	58.750249
2007	58.601882
2008	59.43902
2009	60.259627
2010	60.078083
2011	61.616567
2012	62.992622
2013	62.320821
2014	62.918197
2015	62.978532
2016	64.157215
2017	64.067857
2018	63.883745
2019	65.560836
2020	63.410689
2021	61.681529
2022	63.08421