Year	% of cohort
2009	72.9890899658203
2010	79.9998931884766
2011	83.6339492797852
2012	82.7265777587891
2013	86.6294097900391
2014	97.6205825805664
2015	94.4909820556641
2016	98.083869934082
2017	95.3548431396484
2018	94.4012832641602
2019	94.0228118896484
2020	95.4363632202148
2021	94.0595321655273