Year	% of cohort
1971	65.1081314086914
1972	58.3974113464355
1973	40.9933815002441
1975	60.234130859375
1976	46.7470512390137
1977	52.321361541748
1978	59.4277496337891
1979	69.8993988037109
1980	42.6825714111328
1982	58.6128311157227
1983	42.5719184875488
1984	52.0004997253418
1985	42.5956192016602
1986	49.2557182312012
1987	40.9142684936523
1988	45.2177200317383
1989	13.7031402587891
1991	55.9191017150879
1992	68.0112533569336
1993	54.6705284118652
1994	61.4555587768555
1995	56.670051574707
1996	62.465389251709
1997	62.5237312316895
2000	77.7160873413086
2001	67.7807769775391
2002	65.8107299804688
2003	69.5889129638672
2009	58.9384307861328
2010	60.6847496032715
2011	67.2766799926758
2012	60.4078483581543
2013	62.5462493896484
2014	66.0503921508789
2015	57.3440704345703
2018	42.2347793579102
2019	47.7049407958984
2020	64.3442916870117
2021	63.1744003295898