Year	% of cohort
1988	80.0233306884766
1989	80.6173782348633
1990	85.0645370483398
1991	86.0028991699219
1992	88.0308380126953
1993	88.056022644043
1994	90.6457901000977
1995	92.1500930786133
1996	93.5709381103516
2019	99.9003295898438
2020	99.7857437133789