Year	Cases per 100,000
1990	42030
1991	33080
1992	28200
1993	31180
1994	27470
1995	8153
1996	16180
1997	3593
1998	94580
1999	1284
2001	935.1
2002	1037
2003	31130
2004	31720
2005	29740
2006	26780