Year	% of cohort
1974	58.8762702941895
1975	64.2796020507812
1977	69.6288223266602
1978	68.0683975219727
1982	92.5129470825195
1983	92.287239074707
1984	97.0066604614258
1985	94.1222610473633
1986	92.8660278320312
1987	93.9150085449219
1988	94.2388229370117
1989	94.394889831543
1991	95.0200805664062
1993	96.0691528320312
1994	95.2665023803711
1995	95.7969436645508
1996	95.9154281616211
1997	95.0391006469727
1998	94.5588226318359
1999	93.739387512207
2000	95.9228668212891
2001	96.2432708740234
2002	97.957389831543
2011	95.2204818725586
2012	98.7673873901367
2014	98.0705413818359
2015	99.3626022338867
2016	98.4594573974609