Year	% of cohort
2003	88.0131301879883
2004	90.3566131591797
2007	96.9890289306641
2008	95.4299774169922
2009	99.0453720092773
2011	91.3286514282227
2012	99.8314666748047
2013	98.9262771606445
2014	100
2015	99.3603668212891
2016	99.2254028320312
2017	99.3368606567383
2018	99.0353469848633
2019	99.1126937866211
2020	99.5021286010742
2021	99.3173294067383