Year	% of cohort
1994	86.1844100952148
1995	87.539421081543
1996	88.2510604858398
1997	88.6225967407227
1998	88.6092071533203
1999	88.9102096557617
2000	89.5021667480469
2001	90.0448837280273
2002	89.935302734375
2003	89.4343109130859
2004	89.0494384765625
2005	89.0815277099609
2006	89.4647674560547
2007	89.8553924560547
2008	91.1447830200195
2009	92.3435516357422
2010	92.4043579101562
2011	92.6083908081055
2012	91.4956893920898
2013	91.6707305908203
2014	92.8414535522461
2015	94.1008911132812
2016	95.3034973144531
2017	95.9462585449219
2018	96.2025833129883
2019	96.3085098266602
2020	96.2670288085938
2021	96.2308197021484