Year	% of cohort
1971	71.1909408569336
1978	83.611686706543
1979	80.6875915527344
1980	80.2718276977539
1981	81.5760498046875
1982	83.3603134155273
1983	81.4141006469727
1984	81.4057464599609
1985	79.2997817993164
1987	84.1614685058594
1988	81.6562881469727
1989	83.2279281616211
1995	81.1455993652344
1996	80.9638977050781
1997	84.7206878662109
2000	69.3434600830078
2001	64.7713394165039
2002	77.2677383422852
2003	77.3882369995117
2004	71.447998046875
2005	65.1348419189453
2007	71.855842590332
2008	70.7948532104492
2009	74.7003707885742
2010	72.3621826171875
2011	75.4453201293945
2012	70.0160217285156
2013	79.189453125
2014	73.4446868896484
2019	87.1627807617188
2020	76.2416305541992
2021	82.9116287231445