Year	Cases per 100,000
1990	94.02
1991	71.26
1992	54.71
1993	71.15
1994	75.01
1995	62.42
1996	89.82
1997	79.4
1998	77.82
2000	47.8
2001	652.7
2002	687.1
2003	672.4
2004	669.6
2005	793.1
2006	580