Year	Cases per 100,000
1990	0.01832
1991	0.03695
1992	0.01876
1993	0
1994	0.01951
1995	0.01987
1996	0.1413
1997	0.02046
1998	0.3314
1999	1.068
2000	5.191
2001	9.409
2002	10.23
2003	6.902
2004	5.667
2005	3.465
2006	1.353