Year	% of cohort
1970	73.8879318237305
1971	79.5774230957031
1972	77.5972900390625
1974	63.6309394836426
1975	54.8258399963379
1976	61.6835784912109
1977	56.8788986206055
1979	67.597282409668
1980	60.695369720459
2003	75.3311004638672
2004	80.6108779907227
2014	93.5672836303711