Year	% of cohort
1960	84.30374
1961	84.795153
1962	84.802756
1963	85.076069
1964	85.13933
1965	85.220012
1966	85.113388
1967	85.292747
1968	85.410248
1969	84.931624
1970	85.228921
1971	85.793598
1972	85.802034
1973	85.957489
1974	86.643617
1975	86.68035
1976	86.973398
1977	87.068153
1978	87.245154
1979	87.379312
1980	87.870211
1981	88.031816
1982	88.144562
1983	88.071641
1984	88.338678
1985	88.336118
1986	88.15422
1987	88.496691
1988	88.929278
1989	88.403613
1990	88.753596
1991	88.72661
1992	88.756037
1993	88.696479
1994	88.841905
1995	89.008105
1996	89.097326
1997	89.115859
1998	89.345151
1999	89.082128
2000	89.246138
2001	89.389026
2002	89.29426
2003	89.563318
2004	89.969893
2005	90.103348
2006	90.4417
2007	90.753233
2008	90.624501
2009	90.930406
2010	91.098786
2011	91.089587
2012	91.140655
2013	91.382528
2014	91.615813
2015	91.63865
2016	91.553532
2017	91.936998
2018	91.981118
2019	92.255696
2020	92.764473
2021	92.50671
2022	92.463589