Year	Cases per 100,000
1990	8.53
1991	8.42
1992	8.32
1993	8.23
1994	8.13
1995	8.04
1996	7.89
1997	7.75
1998	7.62
1999	7.48
2000	7.36
2001	7.09
2002	6.85
2003	6.62
2004	6.41
2005	6.22
2006	6.37
2007	6.53
2008	6.7
2009	6.87
2010	7.05
2011	7.27
2012	7.5
2013	7.74
2014	7.99
2015	8.25
2016	8.53