Year	% of cohort
1995	98.8275299072266
1996	97.8524322509766
1998	98.6357421875
1999	99.847282409668
2000	97.9589385986328
2001	98.6993408203125
2002	97.6254272460938
2003	98.7946624755859
2004	98.2433624267578
2005	96.7830429077148
2006	97.9728775024414
2007	97.9728927612305
2008	98.6019592285156
2009	98.3676605224609
2010	96.6571884155273
2011	97.4285507202148
2012	96.7421798706055
2013	97.5827484130859
2014	98.4056396484375
2015	98.5099029541016
2016	98.5403671264648
2017	98.0614929199219
2018	97.6907272338867
2019	99.068962097168
2020	99.4602890014648