Year	Cases per 100,000
1990	47.66
1991	54.97
1992	97.76
1993	103.7
1994	134.7
1995	120.9
1996	78.24
1997	52.15
1998	44.75
1999	46.6
2000	43.32
2001	254.3
2002	212
2003	332.7
2004	143.3
2005	124.4
2006	232.1