Year	% of cohort
1999	91.2091369628906
2001	93.3317108154297
2003	95.8320693969727
2004	96.9981231689453
2005	91.0659332275391
2007	91.2584991455078
2008	89.9577331542969
2010	93.3746566772461
2020	94.8199615478516
2021	96.0158081054688