Year	% of cohort
1960	51.576035
1961	52.223563
1962	52.808213
1963	53.361548
1964	53.902136
1965	54.509746
1966	54.954168
1967	55.407632
1968	55.898004
1969	56.40737
1970	57.134447
1971	57.458256
1972	57.788896
1973	58.167707
1974	58.591762
1975	59.083157
1976	59.683774
1977	60.165091
1978	60.558753
1979	61.227539
1980	61.797458
1981	62.290934
1982	62.911934
1983	63.275692
1984	63.905703
1985	64.417471
1986	64.976395
1987	65.51581
1988	65.935914
1989	65.972451
1990	66.59584
1991	66.717785
1992	66.806152
1993	66.919793
1994	66.972879
1995	66.97879
1996	66.960649
1997	67.042663
1998	66.957775
1999	66.925554
2000	66.851967
2001	66.797664
2002	66.383616
2003	66.8429
2004	67.05336
2005	67.198139
2006	67.599617
2007	68.283049
2008	68.747008
2009	69.16421
2010	69.462609
2011	69.876518
2012	70.340969
2013	70.859159
2014	70.897366
2015	71.350277
2016	71.782916
2017	72.017198
2018	71.897105
2019	71.899306
2020	70.007685
2021	64.864713
2022	65.4633