Year	Cases per 100,000
1980	0
1981	26
1982	104
1983	0
1984	0
1985	0
1986	95
1987	69
1988	90
1989	0
1990	77
1994	41
1999	20
2000	40
2001	30
2002	50
2003	30
2005	109
2006	118
2007	30