Year	% of cohort
1994	96.6019134521484
1999	94.7619323730469
2000	98.2391891479492
2006	94.8240737915039
2007	95.2013778686523
2008	96.1460037231445
2011	96.597038269043
2012	97.3147125244141
2013	96.4467620849609
2014	99.2816009521484
2015	97.2177429199219
2018	99.0983810424805