Year	% of cohort
1960	69.510973
1961	70.152712
1962	70.867036
1963	70.363006
1964	72.282931
1965	72.979102
1966	73.653851
1967	74.3206
1968	74.975687
1969	75.630601
1970	76.283847
1971	76.972602
1972	77.641297
1973	78.28255
1974	78.872439
1975	79.381068
1976	79.788723
1977	80.090723
1978	80.305493
1979	80.44594
1980	80.680715
1981	80.760517
1982	80.827339
1983	80.911233
1984	80.928987
1985	80.922074
1986	80.899469
1987	80.882411
1988	80.898365
1989	80.965177
1990	81.105628
1991	81.320304
1992	81.598746
1993	81.919326
1994	82.27203
1995	82.645757
1996	83.029715
1997	83.421836
1998	83.816615
1999	84.209657
2000	84.606254
2001	84.994944
2002	85.36334
2003	85.702553
2004	86.001938
2005	86.252053
2006	86.455998
2007	86.625571
2008	86.770742
2009	86.909376
2010	87.052625
2011	87.200414
2012	87.338648
2013	87.454271
2014	87.536534
2015	87.573119
2016	87.556869
2017	87.47794
2018	87.330708
2019	87.107112
2020	87.522157
2021	82.441064
2022	87.964759