Year	% of cohort
1960	12.266574
1961	12.474863
1962	12.841265
1963	10.610847
1964	17.680864
1965	11.181435
1966	6.926816
1967	7.213319
1968	7.525691
1969	6.713345
1970	6.993926
1971	14.327648
1972	14.771353
1973	24.358807
1974	24.739717
1975	24.950858
1976	25.200285
1977	25.7534
1978	25.902392
1979	26.234993
1980	26.799738
1981	27.16705
1982	27.354998
1983	20.821843
1984	16.370326
1985	16.863245
1986	17.443816
1987	4.142594
1988	2.448317
1989	11.668868
1990	11.798259
1991	11.884478
1992	4.373765
1993	4.260427
1994	33.020846
1995	12.140723
1996	12.411356
1997	13.380657
1998	2.74325
1999	29.411384
2000	34.016877
2001	35.155734
2002	35.8967
2003	40.714624
2004	41.670713
2005	42.498153
2006	43.111659
2007	43.980278
2008	44.889656
2009	45.016419
2010	46.587556
2011	45.957959
2012	47.679913
2013	47.221361
2014	44.300929
2015	46.312113
2016	46.119857
2017	45.399131
2018	47.406233
2019	47.384276
2020	45.890264
2021	44.759654
2022	45.64502