Year	% of cohort
1960	35.572172
1961	36.526043
1962	36.926235
1963	37.667206
1964	38.146999
1965	38.137985
1966	34.782224
1967	38.265149
1968	38.474989
1969	38.473809
1970	38.261925
1971	38.4973
1972	36.517395
1973	36.718265
1974	33.647457
1975	33.694469
1976	37.498661
1977	37.436808
1978	37.470351
1979	38.38913
1980	38.85301
1981	39.444164
1982	39.720499
1983	28.908622
1984	29.35268
1985	30.171293
1986	30.554152
1987	40.739048
1988	40.128551
1989	40.00687
1990	39.251619
1991	40.862741
1992	41.27213
1993	41.744546
1994	42.119151
1995	42.355921
1996	42.832581
1997	43.68878
1998	44.145252
1999	43.53738
2000	43.978761
2001	44.486864
2002	45.404232
2003	47.172172
2004	48.349912
2005	50.038562
2006	51.937342
2007	54.484395
2008	56.752343
2009	59.415587
2010	60.850698
2011	62.564927
2012	64.113174
2013	65.977325
2014	66.655947
2015	68.298968
2016	70.035734
2017	70.230345
2018	71.708771
2019	72.321667
2020	71.568594
2021	71.199375
2022	72.219637