Year	Cases per 100,000
1990	34.7
1991	51.2
1992	69.1
1993	88.9
1994	108.7
1995	128
1996	144.5
1997	162.3
1998	180.3
1999	199.2
2000	219.6
2001	238.9
2002	255.8
2003	266.8
2004	268.9
2005	264.9
2006	257.4
2007	250.2