Year	Cases per 100,000
1990	285.3
1991	518.1
1992	508.1
1993	350.7
1994	338.6
1995	489
1996	349
1997	456.4
1998	460
1999	163
2000	258.2
2001	486.8
2002	455
2003	377.2
2004	263.7
2005	262.9
2006	263.6