Year	Cases per 100,000
1980	16
1981	9
1982	14
1983	5
1984	7
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	2
1992	10
1993	14
1994	5
1995	12
1996	7
1997	27
1998	11
1999	7
2000	0
2001	4
2002	6
2003	2
2004	4
2005	0
2006	2
2007	8