Year	% of cohort
1974	91.3307189941406
1980	74.7453918457031
1981	76.5216674804688
2010	84.3138580322266
2011	70.3949890136719
2012	82.6672668457031
2013	83.2831115722656
2014	77.4063186645508
2015	86.006462097168
2016	78.3862686157227
2017	66.6751937866211
2018	81.9692230224609