Year	Cases per 100,000
1990	187.1
1991	277.9
1992	326.8
1993	221.1
1994	194.6
1995	136.5
1996	113.5
1997	86.95
1998	93.8
1999	96.33
2000	93.96
2001	234.4
2002	227
2003	198.8
2004	153.1
2005	116.5
2006	106