Year	% of cohort
1960	77.244559
1961	77.354371
1962	77.722947
1963	78.09398
1964	78.060999
1965	79.237806
1966	78.274909
1967	79.5278
1968	79.241743
1969	78.766633
1970	78.911611
1971	80.423503
1972	79.866685
1973	80.244062
1974	80.256817
1975	81.440276
1976	81.619079
1977	81.670903
1978	81.612329
1979	82.502145
1980	82.353143
1981	83.373504
1982	83.484687
1983	83.886938
1984	84.094611
1985	84.647262
1986	84.460478
1987	85.644117
1988	85.373125
1989	85.773982
1990	86.175753
1991	86.726986
1992	87.014509
1993	87.307866
1994	87.746632
1995	87.502011
1996	88.256407
1997	87.774768
1998	88.36427
1999	88.400809
2000	88.536017
2001	89.201863
2002	89.941429
2003	89.618989
2004	90.036237
2005	90.246194
2006	90.461905
2007	91.033142
2008	90.871303
2009	91.069496
2010	91.715264
2011	91.514601
2012	91.667182
2013	92.028527
2014	92.340524
2015	92.330427
2016	92.666572
2017	92.876694
2018	93.01171
2019	93.149527
2020	93.704018
2021	93.230413
2022	93.546907