Year	Cases per 100,000
1980	13
1981	5
1982	0
1983	2
1984	5
1985	3
1986	11
1987	0
1988	5
1989	5
1990	2
1991	0
1992	10
1995	0
1996	4
1997	6
1998	5
1999	4
2000	5
2001	1
2002	5
2003	1
2005	7
2006	5
2007	2