Year	% of cohort
1960	39.147539
1961	40.224104
1962	41.543697
1963	40.605625
1964	42.3174
1965	40.248513
1966	43.187505
1967	43.582271
1968	43.737513
1969	43.743443
1970	31.434505
1971	18.611388
1972	44.052067
1973	44.50754
1974	43.321561
1975	45.055704
1976	44.895062
1977	46.349587
1978	45.861687
1979	45.933851
1980	46.497495
1981	46.75767
1982	47.225248
1983	47.781586
1984	48.78921
1985	49.718536
1986	49.705735
1987	50.585199
1988	50.259649
1989	48.848037
1990	49.822217
1991	47.148127
1992	53.817172
1993	53.645732
1994	54.927455
1995	56.392538
1996	55.051021
1997	60.392459
1998	65.226427
1999	68.749983
2000	68.665955
2001	69.472478
2002	71.01466
2003	71.939771
2004	72.384269
2005	72.789272
2006	72.738582
2007	71.748293
2008	72.654883
2009	72.912003
2010	75.420478
2011	75.756263
2012	77.995875
2013	79.174792
2014	79.19761
2015	79.714983
2016	80.592969
2017	81.493882
2018	82.063404
2019	83.063248
2020	79.535628
2021	79.283337
2022	84.183563