Year	% of cohort
2009	73.2280120849609
2010	80.5639114379883
2011	83.3074035644531
2012	82.7721481323242
2013	86.517219543457
2014	97.0373382568359
2015	95.5952529907227
2016	98.3573913574219
2017	93.9349136352539
2018	93.9621124267578
2019	93.5938720703125
2020	95.0061798095703
2021	95.744743347168