Year	% of cohort
1960	64.181903
1961	64.710585
1962	65.320518
1963	65.892537
1964	66.491519
1965	67.009574
1966	67.506507
1967	67.969005
1968	68.556551
1969	69.20582
1970	69.661891
1971	70.09222
1972	70.563915
1973	70.715342
1974	71.647644
1975	72.14403
1976	72.803377
1977	73.176857
1978	73.232587
1979	72.76449
1980	72.89602
1981	73.351456
1982	74.211981
1983	74.979821
1984	75.851746
1985	76.087529
1986	76.128335
1987	75.463333
1988	75.851949
1989	76.087014
1990	76.884741
1991	77.169175
1992	77.527008
1993	77.573882
1994	77.739334
1995	77.744059
1996	77.658969
1997	78.28594
1998	78.628866
1999	78.94081
2000	79.317815
2001	79.546411
2002	79.6721
2003	79.895537
2004	79.885955
2005	80.334024
2006	80.514737
2007	80.073229
2008	80.163668
2009	80.261467
2010	80.305462
2011	79.699129
2012	79.849875
2013	80.308506
2014	80.736569
2015	80.280239
2016	81.127733
2017	81.443541
2018	81.654911
2019	76.124187
2020	80.47779
2021	78.767513
2022	82.361763