Year	% of cohort
1993	82.653938293457
1994	78.874153137207
1995	78.5844268798828
1996	70.5146179199219
1999	93.8747100830078
2000	60.5433082580566
2001	81.5932922363281
2002	86.1698226928711
2003	80.8531799316406
2004	79.2180023193359
2005	73.7033996582031
2006	59.9699592590332
2007	73.3388519287109
2008	73.1326217651367
2009	69.0192184448242
2010	92.9847869873047
2011	84.7513275146484
2012	77.6005477905273
2014	73.0771789550781
2017	79.9842529296875