Year	% of cohort
1978	56.693660736084
1980	33.3785514831543
1983	31.7922496795654
1984	40.3379402160645
1986	36.2543487548828
1987	37.7618713378906
1999	61.8767509460449
2001	70.2823181152344
2002	60.3592796325684
2003	73.5146865844727
2004	74.7387313842773
2005	70.6506576538086
2007	72.6241073608398
2008	76.7805480957031
2009	75.7179565429688
2010	73.5777969360352
2011	59.4187202453613