Year	% of cohort
1960	31.639206
1961	31.988809
1962	32.769907
1963	33.404064
1964	34.246448
1965	35.245164
1966	36.502768
1967	37.537203
1968	38.289997
1969	38.522327
1970	39.007897
1971	39.725739
1972	40.280655
1973	40.405572
1974	40.951608
1975	41.522019
1976	41.955897
1977	42.247728
1978	42.520237
1979	43.027283
1980	43.57489
1981	44.212765
1982	44.297276
1983	44.724552
1984	44.874062
1985	45.296708
1986	45.207084
1987	45.636617
1988	45.389196
1989	46.169958
1990	46.224967
1991	46.580057
1992	46.967895
1993	47.145239
1994	47.496963
1995	47.885336
1996	48.737362
1997	48.98344
1998	49.716608
1999	49.706859
2000	50.349622
2001	50.436109
2002	51.151625
2003	51.2458
2004	52.002189
2005	52.455467
2006	53.380922
2007	54.122655
2008	48.287125
2009	55.328122
2010	55.625694
2011	56.338414
2012	56.680663
2013	57.921576
2014	58.169496
2015	59.003331
2016	59.15145
2017	59.359205
2018	60.456527
2019	60.710682
2020	60.876105
2021	57.931353
2022	61.74155