Year	Cases per 100,000
1990	8050
1991	6116
1992	5179
1993	14190
1995	16570
1996	526.6
1997	843.4
1998	163.1
1999	14830
2000	17970
2001	17450
2002	13900
2003	12980
2004	10480
2005	11620
2006	9038