Year	% of cohort
1960	31.508801
1961	32.045787
1962	32.800905
1963	33.24108
1964	34.469816
1965	36.723758
1966	41.267205
1967	46.573155
1968	47.771796
1969	47.119801
1970	49.154676
1971	48.426815
1972	49.495948
1973	50.181256
1974	50.753428
1975	51.344591
1976	51.64906
1977	52.178007
1978	53.44385
1979	55.452462
1980	55.379792
1981	55.09205
1982	55.218678
1983	55.057428
1984	54.993738
1985	56.517536
1986	51.88101
1987	57.825616
1988	57.7897
1989	55.131899
1990	56.999285
1991	56.705982
1992	56.162652
1993	55.546636
1994	55.068067
1995	54.867119
1996	54.711943
1997	54.585872
1998	53.901125
1999	54.3049
2000	54.862054
2001	55.307589
2002	55.85167
2003	56.453366
2004	56.52459
2005	55.821176
2006	56.514242
2007	57.180897
2008	57.298459
2009	56.382039
2010	56.445118
2011	55.581591
2012	56.307602
2013	57.800597
2014	58.07665
2015	59.105011
2016	59.477287
2017	60.745784
2018	60.806094
2019	61.048201
2020	59.201799
2021	59.316284
2022	61.478366