Year	Cases per 100,000
1990	9.87
1991	9.68
1992	9.5
1993	9.33
1994	9.16
1995	9
1996	8.9
1997	8.79
1998	8.69
1999	8.6
2000	8.5
2001	8.63
2002	8.76
2003	8.89
2004	9.03
2005	9.17
2006	9.16
2007	9.15
2008	9.14
2009	9.13
2010	9.12
2011	9.15
2012	9.19
2013	9.22
2014	9.26
2015	9.3
2016	9.34