Year	Cases per 100,000
1990	119.6
1991	148.7
1992	115.6
1993	79.49
1994	44.67
1995	44.84
1996	29.83
1997	39.34
1998	36.44
1999	40.63
2000	31.19
2001	586.4
2002	523.4
2003	755.6
2004	529.8
2005	657.2
2006	559.9