Year	% of cohort
1988	81.17014287483032
1989	81.39168925272389
1990	84.46291803974725
1991	85.62219460056006
1992	86.90789907872895
1993	87.39679549657886
1994	89.07411586868126
1995	90.32010010226817
1996	91.85022585416526
2020	98.46020913972139