Year	% of cohort
1960	28.489361
1961	28.674686
1962	29.32843
1963	30.043668
1964	30.516189
1965	31.109068
1966	31.840717
1967	31.561396
1968	31.783595
1969	32.314661
1970	13.300527
1971	13.693105
1972	14.362049
1973	14.433356
1974	14.322545
1975	0.011189
1976	0.083798
1977	7.982648
1978	9.855552
1979	16.011208
1980	30.081022
1981	30.560941
1982	31.27547
1983	32.458315
1984	33.614414
1985	34.878945
1986	35.996644
1987	42.038036
1988	43.841685
1989	43.806852
1990	45.059279
1991	46.368736
1992	47.033489
1993	47.373184
1994	47.789667
1995	48.572068
1996	48.40636
1997	49.502416
1998	49.933397
1999	50.93988
2000	52.302779
2001	54.214773
2002	55.765368
2003	57.686469
2004	59.656403
2005	60.70028
2006	61.812785
2007	62.822033
2008	63.917382
2009	65.318687
2010	65.628047
2011	66.440644
2012	67.593136
2013	67.737776
2014	68.854349
2015	69.004498
2016	69.042322
2017	70.039109
2018	69.974848
2019	70.239152
2020	69.407485
2021	66.926736
2022	67.58666