Year	% of cohort
1995	81.9554061889648
2000	89.6113815307617
2003	89.9289779663086
2006	93.9336776733398
2007	93.4374771118164
2008	93.7623977661133
2009	95.2287063598633
2010	97.8643569946289
2011	98.7833709716797
2012	98.6670379638672
2013	98.712532043457
2014	95.7201309204102
2015	88.8438262939453
2016	93.1785430908203
2017	92.4020919799805
2018	89.0461807250977
2019	89.4376220703125
2020	91.9441375732422
2021	91.5132522583008