Year	% of cohort
1970	82.2861480712891
1971	73.9558181762695
1972	75.1635818481445
1973	75.3488922119141
1974	73.0101623535156
1975	71.7769393920898
1976	77.5019912719727
1982	92.6381072998047
1996	98.2794876098633
2010	98.231201171875
2011	98.1247024536133
2013	99.3373107910156
2014	99.3095092773438
2015	99.2582397460938
2016	99.3936767578125
2017	99.7515869140625
2018	99.7382583618164
2019	100
2020	100