Year	% of cohort
1960	39.37582
1961	40.526867
1962	41.63544
1963	42.686449
1964	44.068223
1965	45.153068
1966	47.336467
1967	49.028527
1968	50.653524
1969	51.9682
1970	53.406477
1971	41.811085
1972	53.772028
1973	53.839173
1974	53.496844
1975	53.97083
1976	54.018683
1977	53.799714
1978	54.590179
1979	54.826656
1980	55.507764
1981	55.959879
1982	56.348397
1983	57.061436
1984	57.499444
1985	58.474684
1986	58.927478
1987	57.94951
1988	57.808029
1989	58.000274
1990	58.338512
1991	59.028108
1992	59.312918
1993	58.986736
1994	58.962334
1995	58.158235
1996	58.724112
1997	58.477855
1998	59.025253
1999	59.959896
2000	60.751321
2001	60.993899
2002	61.481037
2003	61.580673
2004	61.437945
2005	60.064503
2006	61.590682
2007	61.106646
2008	60.966937
2009	61.158939
2010	61.538849
2011	61.837692
2012	61.937708
2013	62.457775
2014	62.603661
2015	63.245396
2016	63.452134
2017	64.02403
2018	64.285371
2019	64.940736
2020	63.054715
2021	62.574189
2022	63.396418