Year	Cases per 100,000
1990	22.1
1991	30.8
1992	39.8
1993	49.8
1994	59.9
1995	70.2
1996	79.4
1997	89.7
1998	100.4
1999	111.7
2000	123.9
2001	135.5
2002	145.9
2003	152.8
2004	154.7
2005	153
2006	149.2
2007	145.5