Year	% of cohort
1960	80.02715
1961	81.122924
1962	80.639115
1963	80.733289
1964	81.466543
1965	81.084493
1966	81.201656
1967	81.783091
1968	81.595963
1969	81.699514
1970	81.731102
1971	82.187552
1972	82.495435
1973	82.891203
1974	83.285289
1975	83.359405
1976	83.670509
1977	84.107973
1978	84.135222
1979	84.749222
1980	84.986459
1981	85.312578
1982	85.449471
1983	85.595177
1984	86.289999
1985	86.551215
1986	86.654669
1987	87.28988
1988	87.60112
1989	87.644381
1990	88.021121
1991	88.234635
1992	88.246862
1993	88.685387
1994	88.514375
1995	88.709574
1996	89.207703
1997	89.119602
1998	89.061577
1999	89.515893
2000	89.363932
2001	89.655601
2002	89.616094
2003	89.751474
2004	90.297938
2005	90.185089
2006	90.414536
2007	90.204044
2008	90.386441
2009	90.440614
2010	90.592668
2011	90.583637
2012	90.923052
2013	90.875761
2014	91.447314
2015	91.054935
2016	91.585411
2017	91.752405
2018	91.672636
2019	92.063054
2020	91.961813
2021	92.423721
2022	92.297342