Year	% of cohort
1990	80.9907913208008
1993	84.6890411376953
1994	85.8760299682617
1995	87.6285171508789
1996	88.2602081298828
1997	88.606330871582
1998	88.5549392700195
1999	88.4146575927734
2000	88.9305877685547
2001	90.1143569946289
2002	89.8247985839844
2003	89.2237777709961
2004	88.9343414306641
2005	89.3267974853516
2006	89.9106597900391
2007	89.9954528808594
2008	91.5053405761719
2009	92.3670501708984
2010	92.0468521118164
2011	91.6620407104492
2012	90.5726470947266
2013	91.1546401977539
2014	91.9014205932617
2015	92.9029235839844
2016	94.0040435791016
2017	94.2094497680664
2018	94.5981674194336
2019	94.5668487548828
2020	94.7746505737305
2021	94.7750625610352