Year	% of cohort
1960	72.706863
1961	72.787167
1962	73.344498
1963	72.688396
1964	73.81802
1965	75.01404
1966	75.066281
1967	74.870606
1968	75.379375
1969	74.260298
1970	76.831864
1971	75.708529
1972	78.110795
1973	77.471419
1974	77.97667
1975	78.220781
1976	78.685579
1977	79.45894
1978	79.601236
1979	80.388837
1980	81.263814
1981	81.481511
1982	82.469062
1983	82.038059
1984	82.330844
1985	82.163454
1986	82.620774
1987	82.763598
1988	82.641356
1989	82.401083
1990	83.350883
1991	82.975569
1992	88.267307
1993	84.763447
1994	91.88938
1995	85.576445
1996	87.67299
1997	89.21341
1998	85.411069
1999	89.355934
2000	89.153498
2001	88.549622
2002	90.427572
2003	91.600198
2004	88.926096
2005	90.024554
2006	91.754124
2007	90.404964
2008	90.438857
2009	90.483871
2010	90.5175
2011	90.551016
2012	90.584419
2013	90.617711
2014	90.650891
2015	90.683959
2016	90.727878
2017	90.760687
2018	90.793387
2019	90.825976
2020	81.951861
2021	84.126321
2022	91.456135