Year	% of cohort
1983	77.8582305908203
1998	71.6787261962891
2001	47.8791999816895
2002	61.6209602355957
2012	75.4824295043945
2015	79.015739440918
2016	77.1742935180664
2017	80.6516494750977
2018	82.5910034179688
2019	84.4236221313477