Year	% of cohort
1960	75.389861
1961	76.136964
1962	76.364405
1963	76.856593
1964	77.351316
1965	77.935653
1966	78.340163
1967	78.653107
1968	78.681517
1969	79.347523
1970	79.644485
1971	80.097237
1972	80.684193
1973	81.316493
1974	81.392716
1975	81.538687
1976	81.989701
1977	82.394848
1978	82.873901
1979	83.208161
1980	83.503598
1981	83.590043
1982	83.752093
1983	83.732452
1984	83.802668
1985	83.294901
1986	84.199083
1987	84.599926
1988	84.668769
1989	84.719776
1990	84.788787
1991	84.849833
1992	84.89341
1993	85.607828
1994	85.610856
1995	85.768287
1996	85.906603
1997	86.151498
1998	86.342709
1999	86.652285
2000	87.033704
2001	87.477498
2002	87.713827
2003	87.832206
2004	88.115593
2005	88.222748
2006	88.330479
2007	88.566753
2008	88.741239
2009	88.757506
2010	88.855959
2011	89.106766
2012	89.235539
2013	89.542794
2014	89.829794
2015	90.627823
2016	91.228419
2017	89.036028
2018	91.170157
2019	90.650181
2020	88.953491
2021	89.894212
2022	90.748919