Year	Cases per 100,000
1990	98.8
1991	119.2
1992	135.6
1993	152.2
1994	167.6
1995	183.2
1996	196.3
1997	212.6
1998	230.1
1999	249.2
2000	270.3
2001	289.8
2002	306
2003	314.3
2004	311.5
2005	300.8
2006	285.3
2007	269.5