Year	% of cohort
1971	61.6478385925293
1978	69.6142120361328
1979	60.5302581787109
1980	54.5057182312012
1981	35.5654411315918
1982	34.7656288146973
1983	18.6741199493408
1984	22.5130996704102
1985	28.536979675293
1986	48.8531188964844
1987	40.7804794311523
1988	38.9758987426758
1989	48.4045715332031
1990	48.3832397460938
1991	35.0734214782715
1995	47.2291488647461
1999	41.6194915771484
2000	63.1257400512695
2002	56.2486991882324
2003	66.0782318115234
2004	62.7835998535156
2005	72.7254180908203
2007	61.997730255127
2009	67.1708221435547
2010	47.7371597290039
2011	64.1989974975586
2012	60.673900604248
2013	51.3726806640625
2020	58.3372917175293
2021	65.3473663330078