Year	% of cohort
1970	77.1705474853516
1974	75.539192199707
1975	77.2102737426758
1996	70.3406982421875
1998	91.4714202880859
1999	94.3226470947266
2000	92.6123962402344
2001	91.3721237182617
2002	82.9516067504883
2003	94.4902877807617
2004	88.7557373046875
2005	94.9739074707031
2006	96.1963577270508
2007	97.2471923828125
2008	94.8125
2009	95.4940719604492
2010	94.9907531738281
2011	96.4914398193359
2012	95.7539291381836
2013	97.4193572998047
2014	96.7620010375977
2015	97.9065628051758
2016	95.5731430053711
2017	95.5081405639648
2018	94.9957504272461
2019	96.036247253418
2020	97.1379089355469