Year	Cases per 100,000
1990	2313
1991	10530
1992	6981
1993	6236
1994	5578
1995	1271
1997	6896
1998	8818
1999	10840
2000	11740
2001	8729
2002	12640
2003	21380
2004	15920
2005	14470
2006	13790