Year	% of cohort
1960	82.280741
1961	82.578624
1962	82.327965
1963	82.678131
1964	83.641333
1965	83.502332
1966	84.177949
1967	84.545728
1968	84.351314
1969	84.439335
1970	85.121894
1971	85.143912
1972	85.839175
1973	86.25139
1974	86.710162
1975	87.267599
1976	87.497717
1977	87.856039
1978	87.675034
1979	87.578839
1980	87.909006
1981	88.196252
1982	88.600625
1983	88.934947
1984	88.90642
1985	89.234121
1986	89.461056
1987	89.817011
1988	89.731519
1989	89.897158
1990	89.788328
1991	90.053198
1992	90.212724
1993	90.224403
1994	90.375876
1995	90.431008
1996	90.906001
1997	90.941639
1998	91.395455
1999	91.477715
2000	91.24035
2001	91.68479
2002	91.66003
2003	91.905981
2004	92.310236
2005	92.462671
2006	92.40174
2007	92.520076
2008	92.765075
2009	92.96521
2010	92.873781
2011	93.273366
2012	93.28275
2013	93.45635
2014	93.820616
2015	93.799938
2016	93.858683
2017	94.258752
2018	93.937881
2019	94.329486
2020	94.311598
2021	94.705835
2022	94.588086