Year	% of cohort
1960	77.15805
1961	77.522401
1962	77.079288
1963	77.756491
1964	78.563142
1965	78.180441
1966	78.481933
1967	78.105202
1968	78.231479
1969	77.476913
1970	77.644774
1971	77.853726
1972	77.702649
1973	77.636455
1974	77.918843
1975	77.355138
1976	77.185622
1977	77.443252
1978	77.375244
1979	76.937945
1980	76.831525
1981	77.091626
1982	77.435767
1983	77.337434
1984	76.754844
1985	76.953052
1986	79.2553
1987	79.253083
1988	79.134108
1989	79.775478
1990	79.404189
1991	79.512836
1992	79.020707
1993	76.575915
1994	75.619011
1995	75.7907
1996	76.87807
1997	77.360758
1998	77.793903
1999	76.823812
2000	76.815146
2001	77.042212
2002	76.686192
2003	76.766104
2004	77.767075
2005	77.931725
2006	78.959942
2007	79.983687
2008	80.229129
2009	80.933547
2010	80.966059
2011	82.157693
2012	82.510296
2013	83.013035
2014	83.516552
2015	84.414889
2016	85.329891
2017	86.158354
2018	86.560559
2019	87.156315
2020	81.733826
2021	79.942128
2022	81.858171