Year	% of cohort
1978	91.1947021484375
1979	95.1475982666016
1982	93.5021209716797
1995	91.8617095947266
1996	90.4089889526367
1997	84.193000793457
1998	87.5649108886719
1999	87.2216720581055
2000	88.8987274169922
2001	88.5284423828125
2002	92.0388565063477
2003	90.8974227905273
2015	97.9220733642578
2016	97.2834625244141
2017	97.7722396850586
2018	98.5903930664062