Year	% of cohort
1970	61.3111686706543
1978	83.9265975952148
1980	80.1752014160156
1982	83.7242126464844
1983	83.1725234985352
1984	89.7048110961914
1985	88.49169921875
1986	89.3265762329102
1987	86.1171417236328
1989	80.4632873535156
1990	90.7763671875
1991	81.4866104125977
1992	87.6399307250977
1993	85.6552276611328
1994	85.4882888793945
1995	86.8972091674805
1998	84.2020416259766
1999	84.3114624023438
2000	86.3247833251953
2001	86.6302719116211
2002	86.9880294799805
2003	88.3849487304688
2004	86.3810729980469
2005	88.824348449707
2008	95.7294311523438
2012	95.1507873535156