Year	Cases per 100,000
1990	234.7
1991	241
1992	236.8
1993	240.8
1994	268.5
1995	313.1
1996	312
1997	268.3
1998	220.1
1999	222.2
2000	194.2
2001	196
2002	170.2
2003	170
2004	171.5
2005	160.1
2006	155