Year	% of cohort
1998	61.008861541748
1999	66.2787322998047
2011	76.0308532714844
2012	87.2733001708984
2013	76.6552276611328
2015	81.7378997802734
2016	77.3988494873047
2017	77.0992202758789
2018	89.8801727294922
2019	83.6451873779297
2020	52.9317893981934