Year	% of cohort
1960	79.70377
1961	79.596124
1962	79.673792
1963	80.253882
1964	80.667377
1965	81.162424
1966	81.224791
1967	81.908892
1968	82.041096
1969	81.748989
1970	82.846859
1971	83.040705
1972	83.915757
1973	84.908928
1974	84.386492
1975	85.008741
1976	85.461463
1977	85.972047
1978	86.783515
1979	86.809746
1980	87.46043
1981	87.679738
1982	88.052343
1983	87.694739
1984	88.467186
1985	88.467191
1986	88.370003
1987	88.160164
1988	88.146585
1989	88.521939
1990	88.626558
1991	88.937109
1992	89.0793
1993	89.354805
1994	89.860354
1995	89.864622
1996	90.455144
1997	90.031929
1998	90.375665
1999	90.492248
2000	90.242781
2001	90.756667
2002	90.799884
2003	91.064974
2004	90.762149
2005	90.360106
2006	91.240809
2007	91.171471
2008	91.297805
2009	91.324848
2010	91.70358
2011	91.912008
2012	91.904688
2013	92.306156
2014	92.619202
2015	93.003417
2016	92.908582
2017	92.820379
2018	92.832487
2019	93.15095
2020	93.35934
2021	93.656656
2022	93.502765