YEAR	% PASS	% A/A*
1987	59
1988	78
1989	67	9
1990	91	23
1991	95	49
1992	90	30
1993	90	45
1994	90	22
1995	92	27
1996	85	18
1997	93	42
1998	92	61
1999	96	73
2000	97.9	68.8
2001	100	74.24
2002	94.1	42.65
2003	97.9	76.6
2004	100	76.7
2005	94.4	74
2006	98.6	74.6
2007	100	77.9