Year	% of cohort
1995	94.9096527099609
1998	98.9329376220703
1999	97.7588424682617
2000	99.0653305053711
2001	98.0654907226562
2002	96.6829833984375
2003	98.2482604980469
2004	98.4440307617188
2005	95.6100997924805
2006	98.3604736328125
2007	98.5593795776367
2008	98.1684188842773
2009	97.3762817382812
2010	97.0437164306641
2011	97.3633728027344
2012	96.7028732299805
2013	97.6478576660156
2014	97.6339111328125
2015	99.3551025390625
2016	99.4182281494141
2017	99.8464279174805
2018	99.2258071899414
2019	99.8907318115234
2020	99.797721862793
2021	99.5132369995117