Year	Cases per 100,000
1980	4
1981	0
1982	0
1983	0
1984	0
1985	4
1986	7
1987	7
1988	3
1989	3
1990	3
1991	0
1992	3
1994	3
1995	3
1996	0
1997	0
1998	0
1999	9
2000	0
2001	0
2002	0