Year	% of cohort
1960	35.70734
1961	35.254962
1962	33.673484
1963	35.151926
1964	34.796774
1965	34.520542
1966	33.900443
1967	33.731355
1968	33.551497
1969	33.573254
1970	33.96211
1971	34.622374
1972	35.582208
1973	36.447882
1974	38.180646
1975	39.455968
1976	41.016455
1977	43.130166
1978	45.017722
1979	47.46947
1980	50.238194
1981	53.662349
1982	57.341551
1983	60.436732
1984	63.339001
1985	66.258512
1986	68.968141
1987	69.362046
1988	70.455048
1989	70.822967
1990	71.620943
1991	72.552099
1992	73.163027
1993	73.08521
1994	73.105566
1995	73.823267
1996	75.414062
1997	76.374734
1998	77.02853
1999	77.432869
2000	78.3963
2001	78.906033
2002	79.53538
2003	79.119353
2004	80.13037
2005	80.605999
2006	81.134565
2007	81.727481
2008	82.294877
2009	83.453447
2010	83.579581
2011	84.164436
2012	84.59492
2013	85.168847
2014	86.038809
2015	86.476312
2016	86.482094
2017	86.528722
2018	86.97482
2019	87.58892
2020	85.163215
2021	87.70347
2022	88.46934