Year	% of cohort
2007	81.8286972045898
2008	83.222900390625
2009	79.3987503051758
2011	75.0723724365234
2014	96.6898498535156
2015	97.2816314697266
2016	98.1160888671875
2017	97.5291595458984
2018	90.1269912719727
2020	96.268440246582