Year	Cases per 100,000
1990	2464
1991	2304
1992	1908
1993	1673
1994	1647
1995	1522
1996	1520
1997	1283
1998	1222
1999	266.7
2001	1239
2002	1543
2003	1520
2004	1267
2005	1055
2006	982.4