Year	% of cohort
1998	78.3825912475586
1999	79.0616073608398
2005	71.383918762207
2011	86.1515502929688
2012	97.6267776489258
2013	83.7977600097656
2015	88.4865264892578
2016	84.638427734375
2017	85.5718536376953
2018	96.1041564941406
2019	89.2436981201172
2020	66.5356597900391