Year	Cases per 100,000
1990	14.1
1991	20.1
1992	27.1
1993	36.1
1994	46.9
1995	59.7
1996	73.3
1997	89.6
1998	107.7
1999	127.4
2000	148.7
2001	169.7
2002	188.8
2003	203.1
2004	209.9
2005	210.8
2006	207.9
2007	204.1