Year	Cases per 100,000
1990	1086
1991	1459
1992	1371
1993	839.4
1994	958.2
1995	1067
1996	1307
1997	1131
1998	722.5
1999	769.8
2000	566.9
2001	382.1
2002	267.2
2003	214.9
2004	258
2005	234.2
2006	165.9