Year	% of cohort
1982	91.4105224609375
1985	93.2736892700195
1986	93.3463363647461
1988	96.3100204467773
1989	90.7183990478516
1990	94.751579284668
1991	92.6191024780273
2001	98.0685882568359
2002	98.5452117919922
2005	98.9439926147461
2006	98.9669723510742
2010	94.6303482055664
2011	100
2012	98.5702972412109
2013	98.1181030273438
2014	99.2932968139648
2015	98.5284194946289
2016	99.2007522583008
2018	99.7966232299805
2019	99.5894775390625