Year	% of cohort
1986	97.2140426635742
1987	96.547233581543
1988	96.6671295166016
1989	99.0554275512695
1990	98.8779525756836
1991	99.4181365966797
1992	99.3217315673828
1993	99.4335327148438
1994	99.4312210083008
1995	98.5038909912109
1996	99.8012619018555
1997	99.2947082519531
1998	99.4847793579102
1999	99.4247970581055
2000	99.2684936523438
2001	99.5224380493164
2002	99.8318328857422
2003	99.6074295043945
2004	99.4765777587891
2005	99.3393402099609
2006	99.6477890014648
2007	99.5937271118164
2008	99.5034713745117
2009	99.7124481201172
2010	99.6155166625977
2011	99.5517272949219
2012	99.4471969604492
2013	99.6293334960938
2014	99.8421020507812
2015	99.7529525756836
2016	99.8086624145508
2017	99.6392669677734
2018	99.5768737792969
2019	99.4934234619141
2020	99.757942199707
2021	98.9162826538086