Year	Cases per 100,000
1980	0
1981	67
1982	0
1983	0
1984	0
1985	127
1986	0
1987	575
1988	64
1989	0
1990	62
1991	63
1992	64
1994	0
1995	135
1996	0
1999	0
2000	0
2001	0
2003	0
2005	0
2006	0
2007	0