Year	% of cohort
1960	66.482091
1961	67.578927
1962	68.552225
1963	69.644782
1964	70.752587
1965	71.603936
1966	72.495107
1967	73.127348
1968	73.699188
1969	74.266396
1970	75.058986
1971	75.783455
1972	76.603518
1973	77.152818
1974	78.07423
1975	78.887609
1976	79.216697
1977	79.856922
1978	79.984565
1979	80.176607
1980	80.621963
1981	80.77455
1982	81.008327
1983	81.350523
1984	80.685879
1985	79.642511
1986	80.599985
1987	80.758905
1988	81.094584
1989	81.075858
1990	82.576879
1991	82.498422
1992	63.576457
1993	63.771444
1994	82.00386
1995	81.124651
1996	84.336055
1997	84.753053
1998	84.907756
1999	86.900838
2000	86.359699
2001	87.281923
2002	85.999274
2003	88.125731
2004	88.394283
2005	88.134589
2006	89.125012
2007	89.070905
2008	89.840446
2009	90.059764
2010	90.072957
2011	89.87835
2012	90.408158
2013	89.233455
2014	88.324258
2015	88.878315
2016	89.679471
2017	89.970903
2018	90.221683
2019	90.473467
2020	89.535103
2021	88.356949
2022	88.316855