Year	Cases per 100,000
1990	19.1
1991	26.4
1992	33.7
1993	41.5
1994	49
1995	56.4
1996	62.6
1997	69.4
1998	76
1999	82.6
2000	89.4
2001	95.2
2002	99.5
2003	100.9
2004	98.5
2005	93.7
2006	87.5
2007	81.6