Year	Cases per 100,000
1990	7.63
1991	7.6
1992	7.56
1993	7.5
1994	7.59
1995	7.65
1996	8.14
1997	7.63
1998	7.7
1999	7.44
2000	7.46
2001	7.58
2002	7.43
2003	7.46
2004	7.27
2005	7.09
2006	7.07
2007	7.11
2008	7.06
2009	6.95
2010	6.81
2011	6.69
2012	6.58
2013	6.37
2014	6.19
2015	6.01
2016	5.85