Year	% of cohort
1977	11.1492204666138
1978	25.2906703948975
1993	69.0974197387695
1997	72.5829010009766
1998	74.5145874023438
1999	78.0230331420898
2000	78.1874237060547
2005	81.1164779663086
2008	84.436149597168
2009	81.487678527832
2010	88.7039031982422
2011	91.2206802368164
2016	84.5508270263672