Year	% of cohort
1960	29.630196
1961	30.072833
1962	30.055554
1963	30.490159
1964	30.906897
1965	31.114346
1966	31.071057
1967	30.259241
1968	31.56108
1969	31.684131
1970	32.239149
1971	32.99068
1972	34.019884
1973	34.743448
1974	35.773779
1975	37.061167
1976	38.820055
1977	40.304448
1978	41.032475
1979	41.032096
1980	41.252921
1981	41.07058
1982	41.194724
1983	41.360391
1984	41.217544
1985	41.032978
1986	40.305075
1987	40.714899
1988	41.002084
1989	41.325932
1990	41.144237
1991	40.611161
1992	40.574988
1993	40.828144
1994	39.930465
1995	39.884887
1996	39.949153
1997	39.933236
1998	39.577126
1999	40.454198
2000	41.10129
2001	41.468803
2002	41.77136
2003	42.44438
2004	42.579604
2005	43.176472
2006	43.495875
2007	43.716828
2008	43.415538
2009	44.125237
2010	44.281927
2011	44.890177
2012	44.974481
2013	45.302388
2014	45.382219
2015	45.310444
2016	45.267497
2017	45.830898
2018	46.019223
2019	46.597907
2020	46.463394
2021	45.564292
2022	47.754808