Year	% of cohort
1972	57.3383483886719
1973	60.141658782959
1974	64.6939468383789
1975	62.5939903259277
1976	57.260669708252
1977	63.1551704406738
1978	66.5849227905273
1979	65.7226409912109
1980	71.6050491333008
1981	69.7657623291016
1982	73.6206130981445
1983	62.1306114196777
1984	72.2812271118164
1985	72.6527481079102
1986	77.8131332397461
1990	69.6443176269531
2006	87.6670303344727
2007	63.2248687744141
2008	79.2466583251953
2009	76.5432586669922
2010	69.5017471313477
2011	79.9146881103516
2014	80.5732269287109
2015	71.8266983032227
2016	55.1601181030273
2017	51.8945503234863
2018	78.0334777832031
2021	82.3405532836914