Year	Cases per 100,000
1990	8.94
1991	8.95
1992	8.85
1993	8.87
1994	8.58
1995	8.37
1996	8.27
1997	8.2
1998	8.17
1999	8.12
2000	8.12
2001	7.87
2002	7.92
2003	7.88
2004	7.72
2005	7.54
2006	7.32
2007	7.13
2008	7.07
2009	6.89
2010	6.85
2011	6.82
2012	6.68
2013	6.52
2014	6.35
2015	6.25
2016	6.2