Year	% of cohort
1983	91.7422409057617
2003	90.098747253418
2004	95.528450012207
2006	94.6745376586914
2007	98.0370712280273
2008	95.9631195068359
2009	93.3131103515625
2010	97.7791900634766
2011	89.5220718383789
2012	95.0383224487305
2013	91.067756652832
2016	97.3811187744141
2017	97.5351867675781
2018	92.6950225830078
2019	96.0201721191406