Year	Cases per 100,000
1990	7.51
1991	7.51
1992	7.55
1993	7.67
1994	7.81
1995	7.94
1996	7.87
1997	8.53
1998	9.04
1999	9.65
2000	10.29
2001	10.02
2002	9.87
2003	9.71
2004	9.56
2005	9.41
2006	9.2
2007	9
2008	8.82
2009	8.64
2010	8.48
2011	8.33
2012	8.18
2013	8.05
2014	7.9
2015	7.76
2016	7.64