Year	% of cohort
1994	98.4300689697266
1995	98.3259124755859
1996	98.9316101074219
1998	99.5436935424805
1999	99.7158508300781
2000	99.1865386962891
2001	99.4011993408203
2002	100
2005	99.7742309570312
2006	99.6441192626953
2007	98.9182586669922
2008	99.2522277832031
2009	99.5996932983398
2010	98.767692565918
2011	99.804801940918
2012	99.1165237426758
2013	98.1394271850586
2014	98.7091827392578
2015	97.6998291015625
2016	96.7366180419922
2017	96.8376770019531
2018	98.8333435058594
2019	98.3006820678711
2020	98.7120895385742