Year	% of cohort
1993	95.1548919677734
1995	98.9553070068359
1998	97.8768997192383
1999	97.79931640625
2000	92.8094024658203
2001	98.304557800293
2002	95.2081604003906
2003	99.8637237548828
2004	98.1150512695312
2005	93.5922622680664
2006	99.9189224243164
2007	98.4449081420898
2008	96.6606063842773
2009	97.5028610229492
2010	95.6248016357422
2011	98.8641662597656
2012	97.5897216796875
2013	99.9072036743164
2014	95.0935592651367
2015	98.8409118652344
2016	98.3855667114258
2018	96.7610473632812
2019	93.1676330566406
2021	98.361213684082