Year	% of cohort
1960	80.112995
1961	81.004172
1962	80.724887
1963	81.214178
1964	81.263643
1965	81.008563
1966	81.254292
1967	81.926639
1968	81.292442
1969	80.65683
1970	80.555056
1971	80.791359
1972	81.686747
1973	81.104269
1974	81.330389
1975	81.708557
1976	82.056456
1977	81.964039
1978	81.369679
1979	82.419732
1980	81.838411
1981	82.377802
1982	82.531522
1983	82.006418
1984	82.479135
1985	82.30022
1986	82.646848
1987	82.515233
1988	82.991026
1989	83.094016
1990	82.943396
1991	82.741007
1992	83.813952
1993	84.225467
1994	84.707066
1995	84.592955
1996	85.318566
1997	85.029867
1998	85.291409
1999	85.687771
2000	86.339571
2001	86.464983
2002	86.636734
2003	86.866098
2004	87.064099
2005	87.116332
2006	87.43772
2007	87.267721
2008	87.884161
2009	87.719824
2010	88.359964
2011	88.779571
2012	88.785512
2013	88.977176
2014	89.257092
2015	88.911114
2016	89.509792
2017	89.407085
2018	89.411317
2019	89.687556
2020	89.679841
2021	87.417731
2022	87.802014