Year	% of cohort
1973	70.0432662963867
1974	81.5305709838867
1977	96.6413116455078
1978	92.5625991821289
1979	95.6212463378906
1982	97.9581604003906
1983	90.0313415527344
1984	83.8193130493164
1985	91.8489990234375
1986	87.9105606079102
1987	91.9877624511719
1988	96.3998489379883
1989	96.9737396240234
1990	95.8882675170898
1991	80.0416030883789
1992	88.7771301269531
1993	98.4325714111328
1994	97.7957992553711
1995	81.9822692871094
1996	83.4152069091797
1997	92.8326721191406
1998	96.9655914306641
1999	92.1134872436523
2000	95.1208419799805
2001	95.6328964233398
2003	94.0512619018555
2004	95.2197494506836
2005	97.9388732910156
2006	96.6817169189453
2010	84.4456634521484
2012	91.9590072631836