Year	% of cohort
1960	60.922673
1961	61.684255
1962	62.540151
1963	63.382679
1964	64.222968
1965	65.02087
1966	66.027156
1967	66.759851
1968	67.442411
1969	68.259729
1970	68.936082
1971	69.724614
1972	70.398301
1973	71.349081
1974	72.062087
1975	72.810716
1976	73.544884
1977	74.190475
1978	74.946919
1979	75.590396
1980	76.423679
1981	77.122188
1982	77.765324
1983	78.341553
1984	78.984225
1985	79.633984
1986	80.276961
1987	80.883565
1988	81.541879
1989	82.177299
1990	82.808087
1991	83.371038
1992	83.824241
1993	84.272892
1994	84.73809
1995	85.166765
1996	85.748046
1997	86.125182
1998	86.178658
1999	86.489027
2000	87.295423
2001	87.326402
2002	87.413133
2003	87.7057
2004	87.915847
2005	88.385044
2006	88.437018
2007	88.687379
2008	89.05063
2009	89.519556
2010	89.144473
2011	89.233467
2012	89.33796
2013	89.609495
2014	89.904334
2015	90.059507
2016	90.292308
2017	90.772733
2018	91.140804
2019	91.149557
2020	91.371859
2021	91.622031
2022	91.586824