Year	% of cohort
2009	84.8806610107422
2010	86.9184875488281
2011	90.2501220703125
2012	96.7308197021484
2013	94.7189407348633
2014	96.475830078125
2015	95.9409790039062
2016	94.6822662353516
2017	95.5631866455078
2018	97.9562835693359
2019	96.2569885253906
2021	97.3201293945312