Year	% of cohort
2006	95.5496292114258
2007	94.7756118774414
2008	94.6811828613281
2009	96.1526107788086
2010	90.9222869873047
2011	94.3117980957031
2012	92.0105590820312
2013	99.0082321166992
2016	98.8177032470703