Year	Cases per 100,000
1990	1277
1991	1025
1992	876
1993	924.1
1994	767.8
1995	675.1
1996	640
1997	734.2
1998	480.1
1999	516.3
2000	488.6
2001	845.9
2002	755.7
2003	887.5
2004	669.5
2005	480.4
2006	627.7