Year	Cases per 100,000
1990	17580
1991	18890
1992	20790
1993	12010
1994	6471
1995	24660
1996	19520
1997	20920
1998	18240
1999	11840
2001	11700
2002	12180
2003	13530
2004	14240
2005	17740
2006	14990