Year	% of cohort
1999	91.6540298461914
2006	93.4512023925781
2010	79.0594329833984
2011	89.2602767944336
2014	89.373893737793
2015	97.1021728515625
2016	82.7438125610352
2017	86.2276382446289
2018	95.7318725585938
2019	84.7133712768555