Year	% of cohort
2006	97.6171035766602
2007	97.8172607421875
2008	98.9128723144531
2009	98.389030456543
2010	97.7073669433594
2011	98.3932266235352
2012	98.5328521728516
2013	97.7230834960938
2014	100
2015	97.6149368286133
2016	98.6816864013672
2017	99.5522994995117
2018	99.2368087768555
2019	97.2383499145508
2020	97.9431304931641
2021	99.6666564941406