Year	Cases per 100,000
1990	20.1
1991	30
1992	42.8
1993	56.7
1994	69.8
1995	80.6
1996	89.1
1997	95.6
1998	100.7
1999	104.7
2000	107.9
2001	110.4
2002	112.4
2003	114.2
2004	115.8
2005	117.3
2006	118.9
2007	121