Year	% of cohort
1960	42.321736
1961	43.434913
1962	44.65255
1963	45.637224
1964	46.022015
1965	46.597877
1966	47.064499
1967	47.868378
1968	48.236923
1969	48.933923
1970	49.635484
1971	50.204372
1972	51.070103
1973	51.35876
1974	51.923882
1975	52.404473
1976	52.892602
1977	53.785339
1978	54.489063
1979	55.16928
1980	56.07224
1981	56.685699
1982	57.547536
1983	58.16108
1984	58.728988
1985	59.408928
1986	60.142788
1987	60.852982
1988	61.520415
1989	62.157118
1990	62.88485
1991	63.592288
1992	63.957222
1993	64.616364
1994	65.207266
1995	65.609192
1996	66.71183
1997	67.547358
1998	68.548989
1999	68.260687
2000	70.165846
2001	70.814062
2002	71.422005
2003	71.918041
2004	72.535373
2005	72.970096
2006	73.532973
2007	74.122575
2008	74.509299
2009	75.021518
2010	75.598962
2011	75.185518
2012	76.526141
2013	77.693488
2014	78.345238
2015	78.396801
2016	78.305819
2017	79.371055
2018	80.214368
2019	80.753156
2020	77.341432
2021	78.002091
2022	81.759683