Year	% of cohort
2008	70.8293075561523
2009	63.2897415161133
2010	82.0519409179688
2011	76.4397735595703
2012	74.73095703125
2013	77.7164611816406
2014	81.0884399414062
2015	78.7662124633789
2016	80.1593017578125
2018	86.0049591064453