Year	% of cohort
1960	66.713742
1961	67.458005
1962	67.593078
1963	67.634127
1964	68.167269
1965	68.321062
1966	68.442355
1967	68.86855
1968	68.338247
1969	67.82131
1970	68.340523
1971	68.892792
1972	69.085903
1973	69.561631
1974	70.234536
1975	69.719464
1976	70.493919
1977	71.307692
1978	71.093386
1979	71.565536
1980	71.899044
1981	72.223936
1982	72.732826
1983	73.136244
1984	73.760106
1985	74.2237
1986	74.643471
1987	75.099184
1988	75.399833
1989	75.730593
1990	75.30899
1991	75.408872
1992	76.044807
1993	76.378512
1994	76.915696
1995	77.425753
1996	78.017154
1997	78.896591
1998	79.765993
1999	80.276498
2000	80.633705
2001	81.183856
2002	81.470885
2003	81.661804
2004	82.395934
2005	82.697181
2006	83.153224
2007	83.371441
2008	83.58921
2009	83.756554
2010	83.963666
2011	84.372764
2012	84.68628
2013	84.744755
2014	85.151637
2015	84.8906
2016	85.190026
2017	85.649519
2018	85.513436
2019	86.017743
2020	85.668162
2021	84.731917
2022	85.352269