Year	Cases per 100,000
1990	577.4
1991	1266
1992	1261
1993	692.8
1994	1005
1995	958.4
1996	950.8
1997	650.2
1998	862.1
1999	865.5
2000	639.5
2001	577
2002	658.3
2003	648.3
2004	271
2005	322.1
2006	941.7