Year	% of cohort
1989	46.8559188842773
1990	71.3362426757812
1993	65.3753814697266
1994	57.0720901489258
1995	56.2260894775391
1996	61.744800567627
1997	59.2776489257812
1998	57.2515411376953
2001	41.5742416381836
2004	40.8391609191895
2005	43.0532913208008
2006	54.7311706542969
2008	82.0055236816406
2012	63.3630905151367
2016	66.4172134399414