Year	Cases per 100,000
1990	37.42
1991	103.8
1992	215.2
1993	152.1
1994	131.1
1995	129.9
1996	153.8
1997	128.9
1998	137.4
1999	104.1
2000	47.83
2001	33.95
2002	24.92
2003	17.19
2004	30.31
2005	81.83
2006	66