Year	Cases per 100,000
1990	140.8
1991	137.9
1992	149.3
1993	98.99
1994	92.34
1995	82.89
1996	57.85
1997	58.68
1998	69.38
1999	49.66
2000	48.02
2001	44.69
2002	46.55
2003	59.68
2004	61.36
2005	54.97
2006	40.7