Year	% of cohort
1983	73.5395584106445
1998	71.2919692993164
2001	48.3020286560059
2002	62.0720596313477
2012	76.9268798828125
2015	81.1308517456055
2016	79.8064117431641
2017	83.1905364990234
2018	85.3367614746094
2019	87.5701522827148