Year	% of cohort
1981	72.7729797363281
1985	74.1864776611328
2000	57.8929901123047
2001	64.0530014038086
2002	56.1700706481934
2003	43.54248046875
2004	48.517879486084
2006	58.269889831543
2008	57.8695983886719
2010	49.3707885742188
2011	62.7015495300293
2012	62.6784210205078
2016	62.1572608947754