Year	Cases per 100,000
1990	5.095
1991	2.431
1992	1.92
1993	2.233
1994	2.756
1995	3.057
1996	5.807
1997	1.659
1998	0.939
1999	0.6081
2000	1.193
2001	0.5768
2002	0.3321
2003	0.321
2004	0.2997
2005	0.6684
2006	0.5341