Year	% of cohort
1960	30.836771
1961	31.05633
1962	31.471416
1963	32.030012
1964	32.661868
1965	33.400418
1966	34.084011
1967	34.812443
1968	35.674752
1969	36.446317
1970	37.341052
1971	38.619767
1972	39.715291
1973	40.9546
1974	42.350196
1975	43.736813
1976	45.034736
1977	46.396975
1978	43.100301
1979	49.15126
1980	50.475038
1981	51.514682
1982	52.795731
1983	53.935896
1984	55.226445
1985	56.322996
1986	57.492322
1987	58.808435
1988	60.235072
1989	61.406223
1990	62.618427
1991	63.781933
1992	64.959757
1993	66.13286
1994	67.455057
1995	69.141191
1996	71.596017
1997	72.354722
1998	72.900977
1999	73.529007
2000	74.850636
2001	76.935505
2002	78.850164
2003	79.906851
2004	78.985852
2005	80.820625
2006	81.620906
2007	82.763482
2008	84.284825
2009	85.222476
2010	86.262082
2011	87.041809
2012	87.976118
2013	88.472942
2014	89.100306
2015	89.444478
2016	89.704168
2017	89.711604
2018	89.863281
2019	90.016373
2020	89.749723
2021	90.35113
2022	90.714592