Year	% of cohort
1960	67.751868
1961	68.002832
1962	67.411092
1963	67.284431
1964	66.124289
1965	66.915463
1966	66.876821
1967	67.158357
1968	66.424654
1969	67.121475
1970	66.724879
1971	68.508313
1972	68.568261
1973	69.085475
1974	68.64859
1975	70.211769
1976	70.680453
1977	71.834685
1978	72.390459
1979	73.398528
1980	73.949046
1981	74.542356
1982	74.911234
1983	76.073334
1984	76.402006
1985	76.808999
1986	77.736504
1987	78.048054
1988	78.495375
1989	78.831327
1990	79.88644
1991	80.716254
1992	80.952394
1993	81.846473
1994	81.919275
1995	82.575489
1996	82.742538
1997	83.300256
1998	83.731129
1999	84.330536
2000	84.879325
2001	85.266528
2002	85.746027
2003	86.08629
2004	86.452861
2005	86.748269
2006	87.104641
2007	86.92689
2008	87.435193
2009	87.492048
2010	87.980749
2011	87.946272
2012	88.453262
2013	88.457748
2014	88.323313
2015	88.182093
2016	88.513384
2017	88.702175
2018	88.827328
2019	88.147374
2020	92.231287
2021	92.926574
2022	89.287141