Year	% of cohort
2000	87.4707412719727
2001	86.5835418701172
2002	80.3180618286133
2003	85.5111694335938
2004	93.9186477661133
2006	90.8394393920898
2007	95.0733413696289
2009	86.1348724365234
2010	91.7812423706055
2011	90.0874633789062
2014	89.5058670043945
2021	90.8669509887695