Year	% of cohort
1974	76.9929428100586
1979	85.2490310668945
1980	69.0402908325195
1981	73.4726181030273
1982	87.9526977539062
1983	78.4677963256836
1990	84.9056396484375
1991	87.7955093383789
1992	83.7595062255859
1993	81.160888671875
2010	83.1564331054688
2011	72.4555130004883
2012	83.8988571166992
2013	80.6019821166992
2014	78.7135467529297
2015	86.7810897827148
2016	78.5360412597656
2017	67.8399810791016
2018	82.3749694824219