Year	Cases per 100,000
1990	9235
1991	8565
1992	8775
1993	10010
1994	9600
1995	10780
1996	11940
1997	11860
1998	9072
1999	14700
2000	16630
2001	14770
2002	14890
2003	16470
2004	15490
2005	15320
2006	15260