Year	% of cohort
1960	44.584837
1961	45.224964
1962	46.142914
1963	46.720932
1964	47.39968
1965	48.004742
1966	48.871152
1967	49.763805
1968	50.878614
1969	51.964201
1970	53.029968
1971	54.468603
1972	55.846575
1973	57.468067
1974	58.895598
1975	60.30348
1976	61.694436
1977	62.882407
1978	64.65319
1979	65.702825
1980	67.391944
1981	68.503447
1982	69.525939
1983	70.685383
1984	71.696035
1985	72.694346
1986	73.570228
1987	74.462928
1988	75.323994
1989	76.241872
1990	76.54124
1991	77.447728
1992	78.348979
1993	78.640022
1994	79.461401
1995	79.400383
1996	80.031415
1997	80.135612
1998	80.241225
1999	81.106287
2000	81.553231
2001	81.807757
2002	82.268
2003	82.655204
2004	83.963138
2005	84.300412
2006	84.533573
2007	84.705041
2008	84.96018
2009	85.038603
2010	86.136514
2011	86.442629
2012	86.740863
2013	86.867911
2014	86.938537
2015	87.048856
2016	87.160388
2017	87.108272
2018	87.153359
2019	86.973024
2020	85.652908
2021	86.638743
2022	87.781626