Year	% of cohort
1960	81.730974
1961	82.468494
1962	82.616975
1963	82.35124
1964	83.047192
1965	82.54091
1966	82.958283
1967	82.951189
1968	83.119539
1969	83.094876
1970	82.895088
1971	83.203709
1972	83.315503
1973	83.600228
1974	83.896847
1975	83.928798
1976	83.545473
1977	84.567985
1978	84.297404
1979	84.01172
1980	83.536954
1981	83.81281
1982	83.887454
1983	83.805145
1984	83.879661
1985	83.528445
1986	83.36932
1987	83.726423
1988	83.715002
1989	83.900948
1990	83.814331
1991	84.287576
1992	84.394802
1993	84.379729
1994	84.914741
1995	84.565484
1996	85.214122
1997	85.548484
1998	86.274312
1999	86.358193
2000	86.795264
2001	87.195081
2002	87.610016
2003	88.063233
2004	88.259011
2005	88.619715
2006	88.82198
2007	88.678623
2008	89.129875
2009	89.404661
2010	89.741064
2011	90.215292
2012	90.492221
2013	90.815906
2014	91.019998
2015	91.0742
2016	91.091328
2017	91.861665
2018	91.737718
2019	92.189131
2020	92.233915
2021	92.433691
2022	92.39657