Year	% of cohort
1960	60.076492
1961	60.591849
1962	61.04522
1963	61.479181
1964	61.920973
1965	62.387112
1966	62.902222
1967	63.38458
1968	63.818628
1969	64.214084
1970	64.581836
1971	64.935323
1972	65.297478
1973	65.692957
1974	66.142168
1975	66.778718
1976	67.577197
1977	68.505178
1978	69.536143
1979	70.730369
1980	72.225816
1981	73.673588
1982	75.215509
1983	76.760274
1984	78.518812
1985	80.191265
1986	81.623151
1987	82.276303
1988	83.307453
1989	83.919385
1990	84.28471
1991	84.593325
1992	84.987134
1993	85.548615
1994	86.287941
1995	87.405419
1996	88.750959
1997	89.905098
1998	90.580469
1999	91.622262
2000	91.988328
2001	92.123568
2002	92.137326
2003	92.11835
2004	92.109952
2005	92.152371
2006	92.268839
2007	92.493499
2008	92.770258
2009	93.085015
2010	93.380569
2011	93.710395
2012	93.962372
2013	94.153157
2014	94.28465
2015	94.379863
2016	94.456602
2017	94.531601
2018	94.629555
2019	94.757336
2020	94.913108
2021	91.181997
2022	94.995331