Year	% of cohort
1999	93.8994598388672
2000	98.152229309082
2001	95.6065979003906
2002	94.2050323486328
2003	99.039306640625
2004	95.9347991943359
2005	93.8918991088867
2006	98.5108184814453
2007	94.7186889648438
2008	96.0998382568359
2010	95.4763793945312
2011	97.7937469482422
2013	99.3990173339844
2015	87.7039337158203
2016	97.8466873168945
2017	89.7587280273438
2018	89.1898803710938
2019	89.5254135131836
2020	88.6258316040039
2021	96.566650390625