Year	% of cohort
1960	37.781938
1961	39.098652
1962	40.314516
1963	41.454387
1964	42.435125
1965	43.357876
1966	44.099101
1967	45.225455
1968	46.061228
1969	47.117472
1970	48.412503
1971	49.480603
1972	50.436227
1973	51.554245
1974	52.614847
1975	53.420164
1976	53.170846
1977	53.453259
1978	53.669385
1979	53.827937
1980	54.041603
1981	54.157408
1982	54.372406
1983	55.060653
1984	55.727662
1985	55.974303
1986	55.573109
1987	56.26972
1988	56.958152
1989	57.675451
1990	58.323811
1991	59.078766
1992	59.756942
1993	60.397497
1994	60.985277
1995	60.728066
1996	60.328809
1997	61.199817
1998	62.743695
1999	63.964592
2000	65.142246
2001	67.626805
2002	69.254179
2003	71.452393
2004	72.402104
2005	72.738951
2006	73.203123
2007	73.822986
2008	74.366012
2009	75.066284
2010	75.722454
2011	75.544392
2012	76.976107
2013	77.825321
2014	78.627052
2015	79.25475
2016	79.824548
2017	80.209453
2018	82.453425
2019	83.579089
2020	84.1048
2021	82.577649
2022	84.655255