Year	% of cohort
1971	87.533073425293
1982	72.123161315918
1984	72.8134078979492
1985	61.2835388183594
1988	64.069938659668
1992	79.7010116577148
1993	75.2343673706055
1995	73.9804306030273
1996	73.9053573608398
1999	65.6863327026367
2000	72.9238433837891
2001	60.4560089111328
2003	75.0350875854492
2004	63.3435592651367
2005	61.6944618225098
2007	70.0476989746094
2010	63.0362091064453
2011	82.8492202758789
2012	72.9601516723633
2013	77.2451095581055
2014	77.7511291503906
2015	75.0522918701172
2018	84.3540573120117
2019	79.7068710327148
2020	78.2203521728516