Year	% of cohort
1971	89.0046081542969
1982	76.0302429199219
1984	80.5587692260742
1985	64.9714508056641
1993	75.6662216186523
1995	70.9495620727539
1996	75.3568420410156
1999	65.2595520019531
2000	71.186279296875
2001	64.4903869628906
2003	73.8668212890625
2004	61.495361328125
2005	61.5130996704102
2007	67.8936004638672
2010	60.1770401000977
2011	83.8305892944336
2012	73.5554962158203
2013	74.5519409179688
2014	75.7170791625977
2015	72.9846725463867
2018	80.2202835083008
2019	74.8870468139648
2020	73.5427322387695