Year	Cases per 100,000
1990	7.4
1991	10.5
1992	14.1
1993	18.5
1994	23.5
1995	29.3
1996	35.2
1997	42.1
1998	49.4
1999	57.2
2000	65.6
2001	73.5
2002	80.6
2003	85.4
2004	87
2005	86.3
2006	84.1
2007	82