Year	Cases per 100,000
1990	68.56
1991	68.45
1992	28.85
1993	9.523
1994	12.43
1995	18.71
1996	12.98
1997	11.3
1998	40.77
1999	189.9
2000	128.1
2001	49.63
2002	49.87
2003	24.5
2004	11.98
2005	6.368
2006	13.68