Year	% of cohort
1960	36.143776
1961	36.947055
1962	37.79929
1963	38.683154
1964	39.580298
1965	40.535975
1966	41.481504
1967	34.701107
1968	43.298033
1969	44.220751
1970	45.130706
1971	46.074619
1972	47.128718
1973	3.008027
1974	49.413547
1975	50.543858
1976	51.798675
1977	53.006795
1978	54.162497
1979	55.391455
1980	56.587113
1981	57.701375
1982	58.768286
1983	59.901707
1984	60.932836
1985	61.864081
1986	62.703927
1987	63.654342
1988	64.196964
1989	64.959365
1990	66.664766
1991	67.337753
1992	67.681312
1993	67.937584
1994	69.501329
1995	69.837053
1996	70.77446
1997	71.545536
1998	71.984877
1999	72.386684
2000	70.231493
2001	67.792609
2002	71.518403
2003	71.090718
2004	71.058711
2005	73.922892
2006	72.842787
2007	73.281297
2008	74.055182
2009	74.39281
2010	75.238887
2011	75.603274
2012	75.938259
2013	77.614524
2014	72.983429
2015	78.136281
2016	78.230564
2017	78.800329
2018	78.183348
2019	79.527347
2020	77.592418
2021	75.478294
2022	75.344967