Year	% of cohort
1960	42.12658
1961	42.789503
1962	43.504496
1963	44.374837
1964	45.211399
1965	46.0024
1966	46.896445
1967	47.84222
1968	48.795381
1969	49.737811
1970	51.070571
1971	51.854234
1972	52.76615
1973	53.790972
1974	54.512125
1975	54.595567
1976	55.560058
1977	56.269031
1978	57.257097
1979	58.322363
1980	59.343487
1981	60.251709
1982	61.336731
1983	61.904469
1984	63.713121
1985	64.616962
1986	64.843249
1987	65.121507
1988	65.224682
1989	65.211998
1990	66.055003
1991	66.054782
1992	66.619977
1993	67.63703
1994	67.284867
1995	68.332419
1996	68.588912
1997	69.091774
1998	71.375706
1999	72.370754
2000	73.927321
2001	75.054582
2002	75.599657
2003	76.407513
2004	76.689675
2005	76.98188
2006	77.261868
2007	77.624919
2008	77.916129
2009	78.205286
2010	78.442651
2011	78.984097
2012	79.539364
2013	80.168105
2014	79.75719
2015	79.091247
2016	79.81138
2017	80.528159
2018	81.194009
2019	81.828068
2020	82.456367
2021	80.307508
2022	82.765343