Year	Cases per 100,000
1980	52
1981	38
1982	44
1983	42
1984	46
1985	31
1986	40
1987	27
1988	32
1989	57
1992	43
1993	50
1994	66
2000	35
2001	40
2002	32
2003	13
2004	30
2005	37
2006	26
2007	31