Year	% of cohort
1992	92.0035171508789
2000	98.7975997924805
2002	99.2284317016602
2008	98.8611221313477
2009	98.585823059082
2017	99.4647903442383
2018	98.9737777709961
2019	99.6967086791992
2020	99.4657897949219
2021	99.554328918457