Year	% of cohort
1980	95.3979415893555
1981	96.8610305786133
1982	97.6991271972656
1983	95.310432434082
1984	98.7436828613281
1987	96.4963836669922
1988	95.7407073974609
1989	95.0144577026367
1990	96.0678863525391
1992	95.1531982421875
2002	97.4804611206055
2005	97.8088073730469
2006	97.5923233032227
2013	93.7835235595703
2014	91.5988311767578
2016	95.4878921508789
2017	90.9478912353516
2018	93.2942504882812
2019	95.3007888793945
2020	97.7993011474609