Year	Cases per 100,000
1980	8
1981	0
1982	0
1983	9
1984	61
1985	80
1986	45
1987	118
1988	55
1989	46
1990	9
1991	9
1992	0
1994	0
1998	15
1999	35
2000	0
2001	0
2002	0
2003	20
2004	0
2005	18
2006	0
2007	34