Year	Cases per 100,000
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0.1
2002	0.2
2003	0.5
2004	1.1
2005	1.8
2006	2.5
2007	2.6