Year	% of cohort
1971	56.7108688354492
1972	61.6972389221191
1973	58.7316207885742
1974	64.7902526855469
1975	65.8073272705078
1976	71.7443008422852
1977	75.9695281982422
1978	62.6864585876465
1979	79.2156982421875
1980	73.1853713989258
1981	73.9768905639648
1982	75.0476531982422
1983	88.6015701293945
1984	62.5977096557617
1986	75.7636871337891
1989	72.0413436889648
1990	82.7883605957031
1991	61.0417518615723
1992	75.9106292724609
1995	67.097541809082
1996	71.9970626831055
1997	71.2475662231445
1998	65.2433776855469
1999	62.1015396118164
2000	75.8135528564453
2001	72.8499374389648
2002	70.4552230834961
2003	74.8902893066406
2006	74.0489501953125
2007	74.1608963012695
2008	71.7983932495117
2009	66.3106994628906
2010	73.5132598876953
2011	65.7532196044922
2012	65.2293395996094
2013	63.3902702331543
2015	77.4589233398438
2021	64.4636383056641