Year	% of cohort
1970	66.8444595336914
1974	65.6191024780273
1975	68.0307464599609
1998	88.1160278320312
1999	92.610969543457
2000	90.3965225219727
2001	89.0453109741211
2002	79.2865371704102
2003	92.8492126464844
2004	85.6763687133789
2005	93.1074905395508
2006	94.3880233764648
2007	96.0604095458984
2008	92.9204788208008
2009	93.8125686645508
2010	93.1348571777344
2011	95.1008834838867
2012	94.1720581054688
2013	96.1908187866211
2014	95.5563735961914
2015	97.9065628051758
2016	94.1917495727539
2017	94.4696273803711
2018	93.861930847168
2019	95.5229263305664
2020	96.7330322265625