Year	% of cohort
1974	82.0382690429688
1980	65.6853408813477
1981	67.1849822998047
2010	74.6653137207031
2011	61.0390090942383
2012	72.7939071655273
2013	73.8995895385742
2014	68.2613220214844
2015	80.7961730957031
2016	67.7431106567383
2017	56.2296409606934
2018	73.1359024047852