Year	% of cohort
1960	49.53942
1961	50.373321
1962	50.866406
1963	51.342614
1964	51.880274
1965	52.484906
1966	53.014708
1967	53.637449
1968	54.096164
1969	54.751632
1970	55.475229
1971	56.192578
1972	56.803343
1973	57.583194
1974	58.330809
1975	59.070406
1976	59.930848
1977	60.826274
1978	61.697723
1979	62.266372
1980	62.762933
1981	63.601008
1982	64.156874
1983	64.791352
1984	64.949177
1985	65.346206
1986	66.237105
1987	65.944549
1988	66.744889
1989	66.168796
1990	66.789202
1991	67.1419
1992	67.342744
1993	66.77753
1994	65.351639
1995	64.517029
1996	62.347146
1997	60.356385
1998	58.363568
1999	56.553745
2000	54.903068
2001	52.018467
2002	48.730834
2003	46.102294
2004	44.600162
2005	43.785091
2006	44.224161
2007	45.703642
2008	47.647589
2009	50.144027
2010	52.963449
2011	55.884965
2012	58.532777
2013	60.084956
2014	61.80348
2015	62.797286
2016	64.216434
2017	65.196481
2018	65.967121
2019	66.977835
2020	64.147429
2021	58.858036
2022	57.223982