Year	% of cohort
1982	91.1325302124023
1985	92.2343368530273
1986	93.4023666381836
1988	94.5094909667969
1989	90.8048629760742
1990	94.0114898681641
1991	91.8094863891602
2001	97.5164794921875
2002	97.5946578979492
2005	98.5344772338867
2006	98.3111877441406
2010	100
2011	93.3779067993164
2012	98.3775482177734
2013	98.4050674438477
2014	99.0710220336914
2015	98.2546005249023
2016	97.7648315429688
2018	97.8983612060547
2019	97.868293762207