Year	% of cohort
1960	67.886261
1961	69.217704
1962	67.760422
1963	67.226059
1964	69.152067
1965	67.434849
1966	68.926119
1967	69.81995
1968	69.963967
1969	67.957375
1970	68.108158
1971	69.316887
1972	71.272414
1973	72.023688
1974	74.805578
1975	74.767276
1976	75.099888
1977	74.819365
1978	74.982297
1979	74.828399
1980	74.505179
1981	76.765287
1982	74.087908
1983	77.439909
1984	77.099813
1985	75.864749
1986	77.938745
1987	79.41856
1988	79.782235
1989	80.895437
1990	81.278413
1991	80.829504
1992	80.959899
1993	82.206072
1994	83.37192
1995	83.544946
1996	81.447083
1997	83.575656
1998	83.871646
1999	84.615108
2000	83.166861
2001	85.534112
2002	85.009747
2003	84.916177
2004	86.086646
2005	86.305556
2006	86.132396
2007	86.708274
2008	86.629746
2009	87.297363
2010	88.784808
2011	87.466515
2012	87.924125
2013	88.167984
2014	89.150912
2015	89.426672
2016	90.003528
2017	90.052365
2018	90.099803
2019	90.624986
2020	90.694331
2021	91.825601
2022	90.828976