Year	% of cohort
1971	88.5905990600586
1972	94.3618316650391
1973	88.7036437988281
1974	90.1388473510742
1975	89.0476837158203
1976	92.7434921264648
1977	84.908576965332
1978	82.3689727783203
1979	86.9632034301758
1980	94.8898010253906
1983	96.177490234375
1984	95.586181640625
1989	83.5429077148438
1992	87.9511489868164
1993	91.3411102294922
1994	87.7328872680664
1995	92.6852264404297
2005	85.3718032836914
2007	90.6552581787109
2012	99.2780609130859
2016	97.0518035888672
2017	96.6382217407227
2018	87.4139099121094
2019	93.9143371582031
2020	84.9390716552734
2021	95.476318359375