Year	% of cohort
1960	32.388472
1961	32.529069
1962	32.942695
1963	33.244977
1964	33.520025
1965	33.854407
1966	34.152513
1967	34.443087
1968	34.72512
1969	34.998932
1970	35.25946
1971	35.524085
1972	35.796114
1973	36.063673
1974	32.955673
1975	33.443621
1976	33.954135
1977	37.137039
1978	36.822456
1979	37.656054
1980	37.903925
1981	38.142082
1982	38.349772
1983	38.806025
1984	39.204702
1985	38.841326
1986	38.925947
1987	39.804547
1988	25.700882
1989	31.186895
1990	31.650988
1991	10.964399
1992	12.696917
1993	41.97729
1994	41.414423
1995	41.749637
1996	41.493427
1997	41.365785
1998	42.062114
1999	41.777147
2000	42.107082
2001	42.231262
2002	42.218522
2003	41.862043
2004	41.651097
2005	41.908704
2006	41.564621
2007	41.208561
2008	42.067825
2009	43.396951
2010	40.661123
2011	42.225455
2012	44.390468
2013	45.484018
2014	45.744672
2015	46.641243
2016	46.469108
2017	47.578644
2018	48.67513
2019	50.06342
2020	45.982384
2021	43.654134
2022	44.86185