Year	% of cohort
2000	84.9240798950195
2001	84.2525329589844
2002	87.1796112060547
2003	81.5933303833008
2004	90.5391311645508
2006	87.4556503295898
2007	89.5163879394531
2009	93.7238311767578
2010	95.975959777832
2011	89.7882080078125
2014	77.7314376831055
2021	95.3906631469727