Year	% of cohort
1971	85.3845596313477
1982	66.1728973388672
1984	70.1374664306641
1985	63.615650177002
1993	84.7191696166992
1995	83.1314010620117
1996	79.0787963867188
1999	66.2181930541992
2000	75.0140991210938
2001	58.8072395324707
2003	79.9190979003906
2004	69.7521820068359
2005	67.8482437133789
2007	72.1419219970703
2010	70.0582962036133
2011	86.0028686523438
2012	75.503791809082
2013	82.8140335083008
2014	83.0294036865234
2015	80.5152893066406
2018	90.2291030883789
2019	88.7326736450195
2020	85.3574905395508