Year	% of cohort
1971	89.7281265258789
1982	76.0302429199219
1984	84.0274810791016
1985	64.9714508056641
1993	77.4423065185547
1995	77.3917617797852
1996	77.5230026245117
1999	65.4557495117188
2000	71.3174896240234
2001	65.1974487304688
2003	76.9735488891602
2004	67.0431823730469
2005	67.5884704589844
2007	70.907470703125
2010	64.831298828125
2011	85.6928863525391
2012	77.6382522583008
2013	77.3208389282227
2014	78.7103500366211
2015	77.7753982543945
2018	83.7295608520508
2019	80.5059509277344
2020	77.0044708251953