Year	% of cohort
1960	82.242208
1961	79.796776
1962	82.772245
1963	80.687245
1964	83.733783
1965	83.304565
1966	83.666154
1967	84.856613
1968	82.110551
1969	82.621252
1970	82.302834
1971	82.938054
1972	83.222042
1973	83.604698
1974	83.698658
1975	82.927654
1976	84.065945
1977	84.448534
1978	84.970846
1979	84.116972
1980	85.200718
1981	85.749325
1982	86.854575
1983	85.955837
1984	88.219516
1985	87.27853
1986	87.745788
1987	88.795232
1988	89.197318
1989	89.337017
1990	89.407376
1991	88.392543
1992	90.657771
1993	88.839061
1994	90.022862
1995	89.83187
1996	90.03252
1997	90.260808
1998	90.956357
1999	90.968348
2000	91.179751
2001	91.285838
2002	90.89821
2003	91.569484
2004	92.038941
2005	92.216152
2006	92.52992
2007	92.927199
2008	93.008033
2009	92.82929
2010	92.877091
2011	93.43128
2012	93.054018
2013	93.254949
2014	93.579217
2015	93.165388
2016	93.079009
2017	93.107158
2018	93.140951
2019	93.120811
2020	93.028675
2021	93.001784
2022	93.228469