Year	% of cohort
1995	97.2324066162109
1996	98.8227386474609
1998	99.1474533081055
1999	98.5360870361328
2000	99.2115707397461
2001	97.8642425537109
2002	98.1072463989258
2003	98.286003112793
2004	97.6077499389648
2005	96.6444091796875
2006	97.5396499633789
2007	98.0715484619141
2008	98.248046875
2009	98.2268981933594
2010	96.1457214355469
2011	97.5678787231445
2012	96.5877990722656
2013	96.8543701171875
2014	98.163688659668
2015	97.9921417236328
2016	98.3523025512695
2017	97.5696029663086
2018	97.6585235595703
2019	98.8770294189453
2020	99.618293762207