Year	Cases per 100,000
1990	100.9
1991	110.7
1992	116.6
1993	122.6
1994	128.8
1995	135.1
1996	139.6
1997	146.3
1998	153.4
1999	161.3
2000	169.8
2001	177.1
2002	182.1
2003	182.3
2004	176.7
2005	167.4
2006	156.7
2007	148.8