Year	% of cohort
1975	75.0050888061523
1976	78.6131286621094
1999	99.4787063598633
2000	99.2419128417969
2001	95.2208023071289
2002	98.1015396118164
2003	98.9686889648438
2005	94.2490692138672
2009	96.6294631958008
2016	97.0382766723633
2018	99.52294921875
2019	99.9692535400391
2020	100