Year	% of cohort
1978	95.9225616455078
1980	91.7504196166992
1982	88.9717102050781
1983	80.8048477172852
1992	79.4095916748047
1994	83.7498092651367
2001	71.730827331543
2003	74.1570892333984
2005	86.5160827636719