Year	% of cohort
1970	75.6674575805664
1971	78.5170211791992
1972	78.5647888183594
1976	61.4394989013672
1977	56.958309173584
1979	68.3765182495117
1980	61.927921295166
2003	73.9614181518555
2004	82.7631301879883