Year	% of cohort
1975	77.9065017700195
1978	61.1946411132812
1981	78.0287780761719
1985	63.4091186523438
2000	57.1395301818848
2001	63.2933692932129
2002	58.0377502441406
2003	41.9329109191895
2004	48.6669998168945
2006	57.9617004394531
2008	57.6531600952148
2010	48.2453994750977
2011	62.353401184082
2012	61.4036293029785
2016	61.1223793029785