Year	% of cohort
1960	60.886284
1961	61.969472
1962	62.194409
1963	62.852243
1964	63.338139
1965	64.061327
1966	64.540898
1967	64.1507
1968	64.047578
1969	63.989489
1970	63.862219
1971	64.339652
1972	64.551655
1973	65.214623
1974	65.584105
1975	66.221422
1976	66.305849
1977	66.179445
1978	65.747897
1979	65.420956
1980	64.202065
1981	63.62864
1982	62.835553
1983	60.690219
1984	63.357666
1985	64.854072
1986	65.973089
1987	66.169692
1988	66.821814
1989	67.307046
1990	67.631459
1991	61.57196
1992	67.789048
1993	69.279855
1994	70.521135
1995	68.988756
1996	71.157373
1997	71.064945
1998	71.111617
1999	71.532814
2000	72.76559
2001	72.883583
2002	72.912632
2003	72.725491
2004	74.406498
2005	74.373785
2006	75.576245
2007	75.333201
2008	75.862473
2009	76.573461
2010	77.375434
2011	78.112916
2012	78.222599
2013	79.22448
2014	79.734399
2015	79.299748
2016	80.597395
2017	80.783179
2018	81.307984
2019	82.388662
2020	81.413419
2021	80.307193
2022	82.869401