Year	% of cohort
1971	75.5187225341797
1978	79.3158187866211
1979	74.5023727416992
1980	67.3318328857422
1981	53.7446212768555
1982	53.7646293640137
1983	37.4365310668945
1984	45.903018951416
1985	51.4608688354492
1986	73.5066604614258
1987	62.3939514160156
1988	61.2806396484375
1989	67.9723281860352
1990	68.388557434082
1991	51.0705490112305
1995	70.8367309570312
1999	52.4820289611816
2000	74.7403411865234
2002	69.2649765014648
2003	76.7742462158203
2004	75.2474594116211
2005	84.6517791748047
2007	75.7142333984375
2009	77.6690979003906
2010	60.7505493164062
2011	74.9156723022461
2012	70.8647308349609
2013	60.7948608398438
2020	74.5233917236328
2021	80.2209625244141