Year	% of cohort
1960	29.561264329122817
1961	34.502022160750215
1962	42.026129284988485
1963	42.874810510858964
1964	44.072771053582215
1965	44.81103137801673
1966	45.79024145584092
1967	46.57237149119498
1968	47.24711148221043
1969	48.051596301328324
1970	49.232762714269455
1971	50.54031215868816
1972	51.43882827719955
1973	52.8400674466301
1974	53.62738932289769
1975	54.7501187859082
1976	55.78120362475637
1977	56.69661135835999
1978	57.49042461166655
1979	58.25719505043568
1980	58.9425570325331
1981	59.87156108642148
1982	60.66849278013748
1983	61.27615497890619
1984	61.848416968745354
1985	62.55241614287143
1986	63.58837843862134
1987	64.13118467648846
1988	64.529053530046
1989	64.9059046348419
1990	65.10940743678948
1991	65.63718286140195
1992	66.11518586838689
1993	66.19543772424261
1994	66.45570955532388
1995	66.83923194928487
1996	67.59019824417243
1997	68.41905984097528
1998	68.985485005385
1999	69.30051719485289
2000	69.57430429105366
2001	70.16248055699069
2002	70.5665288979723
2003	71.19278808373
2004	71.69116331250738
2005	72.34124481181004
2006	73.13345640840544
2007	73.61249200629314
2008	73.87988497431193
2009	74.55089414896699
2010	75.00793801573721
2011	75.55281306334894
2012	75.97023191847275
2013	76.48734951584852
2014	76.9786175762981
2015	77.30724052817607
2016	77.65843020903213
2017	77.7918474670848
2018	78.50789456451011
2019	78.9341986457643
2020	78.23854099136885
2021	77.54334344814033
2022	78.38140209795897