Year	% of cohort
2009	84.5791320800781
2010	87.0322875976562
2011	90.4737701416016
2012	97.0481872558594
2013	95.5637664794922
2014	96.9910202026367
2015	97.3735885620117
2016	95.6119689941406
2017	96.3788986206055
2018	98.5140914916992
2019	97.2203216552734
2021	97.3531112670898