Year	% of cohort
1960	75.593075
1961	74.995078
1962	74.820926
1963	74.717342
1964	74.928389
1965	74.622498
1966	75.43094
1967	75.227928
1968	74.828091
1969	74.074306
1970	74.355133
1971	74.79627
1972	75.147257
1973	75.134524
1974	75.386435
1975	75.619759
1976	75.858962
1977	76.42376
1978	76.447738
1979	76.004331
1980	76.309381
1981	76.999787
1982	77.043226
1983	77.042284
1984	77.862323
1985	77.2963
1986	77.577134
1987	77.399349
1988	77.94226
1989	78.522588
1990	79.251925
1991	80.00058
1992	80.247206
1993	80.77596
1994	81.830554
1995	81.945728
1996	82.780801
1997	82.958105
1998	82.793215
1999	83.430687
2000	83.773419
2001	84.176485
2002	84.512814
2003	85.298289
2004	85.71892
2005	86.133929
2006	86.266779
2007	86.868311
2008	86.883967
2009	86.965785
2010	87.380574
2011	87.643534
2012	88.051559
2013	88.263929
2014	88.900904
2015	89.411324
2016	89.458676
2017	90.056902
2018	90.021364
2019	90.132612
2020	90.598849
2021	91.091217
2022	90.834416