YEAR	% PASS	% A/B
1986	40
1987	78
1988	87
1989	78	22
1990	80	29
1991	74	17
1992	100	45
1993	95	10
1994	100	45
1995	92	28
1996	95	37
1997	97	53
1998	97	56
1999	100	79
2000	100	66.7
2001	100	83.3
2002	100	88.5
2003	100	78.1
2004	100	90.9
2005	100	87.5
2006	100	80.6
2007	100	76.2