Year	% of cohort
1989	55.1324005126953
1990	73.6985092163086
1993	71.6201171875
1994	66.3064498901367
1995	56.4567909240723
1996	55.7640419006348
1997	57.6292991638184
1998	55.6797218322754
2001	39.3871994018555
2004	37.9727897644043
2005	46.1448783874512
2006	54.2202301025391
2008	80.4659729003906
2012	64.9136123657227
2016	63.2857398986816