Year	% of cohort
1988	80.61971608738021
1989	80.82887508359046
1990	84.99294819186528
1991	85.53402302439999
1992	87.64118059018392
1993	88.44596041224867
1994	89.5500820003327
1995	91.88698795719401
1996	92.48221274840579
2019	99.21490805550314
2020	99.74431822282432