Year	% of cohort
1995	95.6346664428711
1998	99.1629867553711
1999	98.5895462036133
2000	99.5060119628906
2001	98.0654907226562
2002	97.2569274902344
2003	98.5241470336914
2004	98.4440307617188
2005	96.7388229370117
2006	98.3604736328125
2007	98.9713973999023
2008	98.8313064575195
2009	97.3917922973633
2010	97.956916809082
2011	97.7775497436523
2012	97.3220672607422
2013	97.9983062744141
2014	97.93408203125
2015	99.3551025390625
2016	99.4182281494141
2017	99.8464279174805
2018	99.2258071899414
2019	99.9928436279297
2020	99.8625411987305
2021	99.5565795898438