Year	Cases per 100,000
1990	1183
1991	935.4
1992	1218
1993	953.2
1994	1109
1995	1040
1996	1026
1997	997.1
1998	1794
1999	1617
2000	1985
2001	1760
2002	1984
2003	1937
2004	2399
2005	2499
2006	2752