Year	Cases per 100,000
1990	9.75
1991	9.19
1992	8.88
1993	8.59
1994	8.28
1995	8.09
1996	7.89
1997	7.77
1998	7.71
1999	7.75
2000	7.77
2001	7.92
2002	7.97
2003	8.11
2004	8.17
2005	8.28
2006	8.44
2007	8.59
2008	8.7
2009	8.85
2010	9
2011	8.98
2012	8.95
2013	8.92
2014	8.86
2015	8.82
2016	8.77