Year	Cases per 100,000
1980	31
1981	0
1982	69
1983	110
1984	39
1985	0
1986	216
1987	0
1988	141
1990	0
1992	89
1993	44
1994	88
1995	0
1996	91
1997	0
1998	0
1999	51
2000	0
2001	0
2002	228
2003	0
2004	0
2005	0
2006	0
2007	0