Year	% of cohort
1971	74.306999206543
1978	88.197021484375
1979	84.9521713256836
1980	87.3668594360352
1981	89.1457824707031
1982	89.0213394165039
1983	85.6630783081055
1984	87.1289215087891
1985	86.5233001708984
1987	91.6298065185547
1988	88.5981674194336
1989	91.9547500610352
1995	81.2445907592773
1996	89.098503112793
1997	88.763069152832
2000	75.0576019287109
2001	70.0723037719727
2002	82.6658020019531
2003	78.968132019043
2004	74.5817565917969
2005	64.9745635986328
2007	70.0508880615234
2008	68.865837097168
2009	72.6276321411133
2010	71.1347427368164
2011	71.0781021118164
2012	69.1019973754883
2013	76.1075820922852
2014	70.345329284668
2019	81.7345733642578
2020	70.2185211181641
2021	76.0752410888672