Year	% of cohort
1960	17.743034
1961	18.350272
1962	18.878496
1963	19.3959
1964	19.941843
1965	20.46736
1966	21.023513
1967	21.555966
1968	22.124751
1969	22.709707
1970	23.290642
1971	23.874533
1972	24.493856
1973	25.193102
1974	25.889078
1975	26.600091
1976	27.298929
1977	28.07586
1978	25.404897
1979	22.464494
1980	23.028199
1981	23.616633
1982	18.688441
1983	18.944293
1984	11.142771
1985	11.107874
1986	19.620928
1987	19.939093
1988	27.260803
1989	29.186547
1990	30.315712
1991	31.18657
1992	32.042283
1993	40.988076
1994	39.335989
1995	41.994995
1996	43.056344
1997	43.69259
1998	41.620708
1999	45.660509
2000	46.116872
2001	46.891548
2002	48.554162
2003	49.85824
2004	50.875379
2005	51.383972
2006	51.391496
2007	51.544782
2008	52.973162
2009	54.119459
2010	54.841702
2011	55.718273
2012	56.515048
2013	57.291739
2014	57.223704
2015	56.993402
2016	57.685135
2017	55.147806
2018	54.647829
2019	55.972735
2020	53.562234
2021	51.520426
2022	52.99077