Year	% of cohort
1960	48.441039
1961	48.796251
1962	49.571575
1963	50.464515
1964	51.247896
1965	51.972556
1966	52.11255
1967	52.58021
1968	52.510844
1969	52.851284
1970	52.818129
1971	52.539421
1972	52.473002
1973	53.140566
1974	53.107214
1975	53.012885
1976	53.470558
1977	53.322363
1978	53.172784
1979	53.652257
1980	54.308907
1981	55.231676
1982	56.511421
1983	54.811077
1984	54.939498
1985	54.973981
1986	59.337135
1987	60.496247
1988	60.194443
1989	60.920891
1990	59.463671
1991	57.399299
1992	55.647165
1993	55.585013
1994	52.460701
1995	52.076903
1996	50.430262
1997	52.961231
1998	53.590335
1999	53.256749
2000	54.603454
2001	54.956107
2002	55.218376
2003	56.039112
2004	56.493666
2005	56.789627
2006	56.956087
2007	58.090542
2008	58.917712
2009	58.774597
2010	57.765739
2011	56.946278
2012	56.64483
2013	56.341614
2014	56.151805
2015	56.43324
2016	58.182462
2017	59.814161
2018	59.47958
2019	60.760954
2020	58.69763
2021	55.080469
2022	54.4461