Year	% of cohort
1960	76.949425
1961	78.111412
1962	76.895906
1963	77.453173
1964	79.534615
1965	78.758095
1966	79.029645
1967	79.29182
1968	79.289047
1969	79.810628
1970	80.302936
1971	79.709089
1972	81.272465
1973	81.926493
1974	81.124896
1975	81.165184
1976	81.009106
1977	83.438755
1978	83.349352
1979	84.487252
1980	83.57021
1981	84.349574
1982	84.978299
1983	85.048303
1984	85.420538
1985	86.0941
1986	86.921903
1987	86.492793
1988	87.972423
1989	87.120702
1990	87.9747
1991	88.395202
1992	87.939142
1993	88.696272
1994	88.980037
1995	89.687776
1996	89.412351
1997	89.219004
1998	89.663736
1999	90.11083
2000	90.447391
2001	90.343882
2002	90.754967
2003	89.956463
2004	91.216769
2005	90.9584
2006	90.826278
2007	91.248902
2008	91.725067
2009	91.849329
2010	92.015961
2011	92.00314
2012	92.017252
2013	92.119939
2014	93.001437
2015	92.671572
2016	93.085262
2017	92.799254
2018	92.818635
2019	93.255556
2020	92.949408
2021	93.910827
2022	93.449707