Year	% of cohort
1980	50.5420303344727
1981	76.888671875
1982	71.0915679931641
1983	78.8794403076172
1984	78.180061340332
1987	83.1721496582031
1998	44.0778312683105
2002	56.5991287231445
2003	61.2993812561035
2004	68.9102935791016
2007	75.0282287597656
2008	68.0299377441406
2009	66.1306304931641
2016	92.6919708251953