Year	% of cohort
1970	81.0139312744141
1971	74.3563003540039
1972	77.1535263061523
1973	76.5783233642578
1974	75.2490615844727
1975	76.2434768676758
1976	79.6738128662109
1982	97.1817779541016
1996	99.2732925415039
2010	98.0556716918945
2011	99.3583984375
2013	99.9510498046875
2014	99.9473571777344
2015	100
2016	99.9019088745117
2017	99.8811874389648
2018	99.971061706543
2019	98.6297225952148
2020	99.2712936401367