Year	% of cohort
2002	82.7890014648438
2003	80.1733627319336
2006	84.8222808837891
2007	88.6007080078125
2009	90.3862991333008
2010	95.975959777832
2011	85.9106521606445
2014	77.4446029663086
2021	90.7855834960938