Year	Cases per 100,000
1990	9.92
1991	9.82
1992	9.81
1993	9.77
1994	9.72
1995	9.62
1996	9.19
1997	8.79
1998	8.44
1999	8
2000	7.75
2001	7.68
2002	7.74
2003	7.82
2004	7.82
2005	7.8
2006	7.77
2007	7.72
2008	7.61
2009	7.46
2010	7.35
2011	7.29
2012	7.2
2013	7.16
2014	7.21
2015	6.99
2016	6.75