Year	% of cohort
1960	65.642559
1961	67.095965
1962	66.701724
1963	66.268876
1964	67.307635
1965	66.812259
1966	67.262277
1967	67.506283
1968	67.170352
1969	67.06098
1970	67.763444
1971	67.942648
1972	68.490123
1973	69.256888
1974	69.98834
1975	70.223746
1976	70.132004
1977	71.162451
1978	70.976092
1979	71.805552
1980	71.713098
1981	73.030921
1982	73.288282
1983	73.595772
1984	74.29448
1985	74.426299
1986	75.302064
1987	75.977802
1988	76.649557
1989	77.340298
1990	77.81768
1991	77.989155
1992	78.211617
1993	78.528366
1994	78.88682
1995	78.847643
1996	79.661131
1997	80.123686
1998	80.285546
1999	80.02904
2000	80.549225
2001	80.732224
2002	81.108495
2003	81.51171
2004	82.187625
2005	82.337346
2006	82.76256
2007	83.067795
2008	82.700468
2009	83.437202
2010	83.87734
2011	84.229361
2012	84.217765
2013	84.895792
2014	85.568283
2015	85.589614
2016	85.985185
2017	86.459404
2018	86.81902
2019	87.30219
2020	86.595984
2021	87.271875
2022	87.758835