Year	% of cohort
1986	97.4489898681641
1987	96.5757522583008
1988	96.7538299560547
1989	99.1687469482422
1990	99.4947967529297
1991	99.7033233642578
1992	99.4668807983398
1993	99.5241775512695
1994	99.549919128418
1995	99.4342498779297
1996	99.8087997436523
1997	99.4787216186523
1998	99.5579986572266
1999	99.4876480102539
2000	99.3630294799805
2001	99.5252532958984
2002	99.8627624511719
2003	99.7970809936523
2004	99.4775772094727
2005	99.4289169311523
2006	99.7178115844727
2007	99.6904907226562
2008	99.688720703125
2009	99.7279891967773
2010	99.6796035766602
2011	99.6913299560547
2012	99.4886016845703
2013	99.6795425415039
2014	99.8567428588867
2015	99.7999420166016
2016	99.8110733032227
2017	99.7455215454102
2018	99.6671600341797
2019	99.6810684204102
2020	99.8100662231445
2021	99.2540969848633