Year	% of cohort
1975	75.4931716918945
2003	96.285530090332
2004	98.7386932373047
2005	98.2687911987305
2006	98.7245330810547
2007	97.3588562011719
2009	99.3475723266602
2011	97.4710006713867
2016	96.4930114746094
2018	98.0753326416016
2019	99.5036163330078