Year	Cases per 100,000
1990	7.8
1991	7.61
1992	7.44
1993	7.27
1994	7.15
1995	7.05
1996	6.95
1997	6.87
1998	6.83
1999	6.95
2000	7.06
2001	7.26
2002	7.35
2003	7.23
2004	6.97
2005	6.79
2006	6.85
2007	6.76
2008	6.85
2009	7.11
2010	6.96
2011	6.79
2012	6.5
2013	6.28
2014	6.12
2015	5.95
2016	5.79