Year	% of cohort
1960	68.84975
1961	68.186951
1962	67.340097
1963	66.409144
1964	69.885411
1965	72.309164
1966	70.464446
1967	71.440877
1968	71.741588
1969	71.985265
1970	72.240332
1971	73.536049
1972	73.030705
1973	74.615458
1974	74.99631
1975	75.340043
1976	75.680947
1977	76.163159
1978	76.500505
1979	76.877826
1980	77.850835
1981	78.202282
1982	78.61806
1983	78.959354
1984	79.369812
1985	79.709863
1986	80.27662
1987	81.132621
1988	81.581215
1989	81.967511
1990	82.349293
1991	82.753267
1992	83.081556
1993	83.352319
1994	83.726095
1995	83.710118
1996	84.511946
1997	84.711124
1998	84.688758
1999	84.455075
2000	85.54567
2001	85.660105
2002	85.787927
2003	85.366327
2004	85.395151
2005	85.672187
2006	84.947186
2007	84.724561
2008	86.928087
2009	87.275438
2010	86.954439
2011	87.902082
2012	87.941649
2013	88.379492
2014	88.722593
2015	90.12767
2016	90.644607
2017	90.555684
2018	90.97967
2019	90.996669
2020	90.8412
2021	90.429015
2022	90.687645