Year	% of cohort
1983	40.7659301757812
1984	42.0752792358398
1985	46.4976615905762
1986	44.6065711975098
1987	47.001148223877
1988	50.7122611999512
1989	48.7670516967773
1990	68.2686080932617
1991	48.5108184814453
1992	70.3310165405273
1993	75.5002593994141
2003	75.148323059082
2004	73.3590698242188
2005	76.4814834594727
2006	77.6357803344727
2007	64.9618911743164
2008	64.2957000732422
2009	62.2282218933105
2011	55.6720695495605
2012	64.4720230102539
2013	64.9950790405273