Year	Cases per 100,000
1990	38.2
1991	52.8
1992	67.4
1993	83
1994	98.1
1995	112.9
1996	125.3
1997	138.7
1998	151.9
1999	165.2
2000	178.7
2001	190.4
2002	199
2003	201.7
2004	197
2005	187.5
2006	175.1
2007	163.1