Year	% of cohort
1981	82.3373031616211
1985	55.74755859375
2000	56.4177398681641
2001	62.5517616271973
2002	59.9596710205078
2003	40.3629684448242
2004	48.8732299804688
2006	57.6509590148926
2008	57.4346618652344
2010	47.1335792541504
2011	62.0013618469238
2012	60.1380882263184
2016	60.0818099975586