Year	% of cohort
1971	41.8660583496094
1972	55.7220497131348
1973	48.2784690856934
1975	52.1675109863281
1977	54.5403289794922
1980	50.270149230957
1981	64.2191619873047
1982	68.4532699584961
1985	42.8728904724121
1986	30.149320602417
1987	73.3959503173828
1988	64.9802169799805
1990	38.8507614135742
1991	25.1267395019531
2008	57.6134910583496
2009	60.8959884643555
2010	57.8470497131348
2011	57.1603202819824