Year	% of cohort
1960	45.570782
1961	46.347667
1962	47.112953
1963	47.823271
1964	48.419646
1965	48.845012
1966	49.08929
1967	49.315251
1968	49.587806
1969	49.740014
1970	50.580883
1971	51.479926
1972	52.586135
1973	53.810692
1974	55.131109
1975	56.455644
1976	57.667108
1977	58.856951
1978	59.879181
1979	60.779046
1980	61.554695
1981	62.234757
1982	62.794401
1983	63.19392
1984	63.82691
1985	64.293453
1986	64.748516
1987	65.183407
1988	65.608178
1989	66.016301
1990	66.460086
1991	66.583489
1992	67.253722
1993	67.617337
1994	68.291145
1995	68.76908
1996	69.281797
1997	69.767336
1998	70.311333
1999	70.934921
2000	71.511437
2001	72.135652
2002	72.723165
2003	73.278745
2004	73.733482
2005	74.048749
2006	74.248837
2007	74.435233
2008	74.642805
2009	75.043012
2010	75.636707
2011	76.453371
2012	77.336264
2013	78.195216
2014	78.904812
2015	79.370739
2016	79.400993
2017	79.622267
2018	79.550784
2019	79.42787
2020	67.812682
2021	70.716905
2022	80.59668