Year	Cases per 100,000
1990	13.3
1991	20.9
1992	31.9
1993	47
1994	66
1995	87.9
1996	110.6
1997	132.3
1998	151.2
1999	166.9
2000	179.5
2001	189.6
2002	198.1
2003	205.1
2004	211
2005	216.5
2006	221.9
2007	227.5