Year	% of cohort
1960	33.117824
1961	33.613394
1962	34.187207
1963	34.320446
1964	34.801954
1965	35.26045
1966	35.728315
1967	36.133844
1968	36.483574
1969	37.160825
1970	37.674479
1971	38.257101
1972	38.790744
1973	39.505025
1974	40.257636
1975	40.536491
1976	41.160277
1977	41.825758
1978	42.546006
1979	43.250072
1980	43.931361
1981	44.519548
1982	44.988404
1983	45.296678
1984	46.107966
1985	46.574022
1986	47.199477
1987	47.764287
1988	48.707536
1989	49.423578
1990	50.262919
1991	51.099775
1992	51.949081
1993	52.814109
1994	53.316997
1995	53.943684
1996	54.561731
1997	55.654932
1998	56.258444
1999	56.708464
2000	57.247111
2001	57.748214
2002	58.198222
2003	58.358229
2004	59.024264
2005	59.45103
2006	59.972703
2007	60.201661
2008	60.703146
2009	61.243621
2010	61.466045
2011	61.969639
2012	61.990491
2013	62.483959
2014	62.72478
2015	62.988572
2016	63.570041
2017	63.622133
2018	63.624849
2019	63.746767
2020	51.991386
2021	49.638002
2022	53.673379