Year	% of cohort
1977	13.9242496490479
1978	29.400899887085
1993	84.0915374755859
1997	87.5888977050781
1998	88.8703079223633
1999	92.2377395629883
2000	93.2391586303711
2005	95.0354232788086
2008	98.5529022216797
2009	95.5435562133789
2010	96.3823013305664
2011	99.9007873535156
2016	97.1583023071289
2017	92.5194473266602