Year	% of cohort
1975	81.8003997802734
1976	87.4246826171875
1999	98.8056182861328
2000	98.7760696411133
2001	94.7705383300781
2002	94.2822265625
2003	98.2610397338867
2005	92.2006072998047
2009	95.6026000976562
2016	95.8352432250977
2018	98.5209197998047
2019	99.3309020996094
2020	99.5185928344727