Year	Cases per 100,000
1990	50.5
1991	55.4
1992	58.3
1993	61.3
1994	64.4
1995	67.6
1996	69.8
1997	73.1
1998	76.7
1999	80.6
2000	84.9
2001	88.5
2002	91.1
2003	91.2
2004	88.3
2005	83.7
2006	78.3
2007	74.4