Year	Cases per 100,000
1980	0
1981	11
1982	0
1983	5
1984	5
1985	19
1986	5
1987	0
1988	0
1989	8
1990	8
1991	11
1992	10
1993	7
1995	6
1996	0
1997	0
1998	8
1999	5
2000	12
2001	2
2002	0
2003	0
2004	2
2006	0
2007	2