Year	% of cohort
1987	73.1889724731445
1988	76.1214370727539
1991	85.8870315551758
1992	77.8264312744141
1996	89.0148010253906
1999	92.1395568847656
2002	83.8803405761719
2003	91.9813766479492
2004	93.3051300048828
2005	93.1071319580078
2006	100
2007	83.4953994750977
2008	94.7186584472656
2009	94.1970367431641
2010	97.7006607055664
2011	98.0159530639648
2012	98.0471725463867
2013	91.9823608398438
2014	90.2596282958984
2015	83.7167282104492
2016	83.6764907836914