Year	% of cohort
1986	86.3600234985352
1987	88.5040435791016
1988	89.741813659668
1989	91.3268966674805
1990	91.7253875732422
1991	90.666862487793
1992	91.4508285522461
1993	90.0821075439453
1994	91.7963333129883
2000	98.0968475341797
2001	93.7421112060547
2002	87.7752304077148
2008	96.601921081543
2009	92.8589935302734
2010	98.3478317260742
2011	95.8195190429688
2013	91.7861175537109
2014	98.2485809326172
2015	97.054443359375
2016	98.3003082275391