Year	Cases per 100,000
1990	4.01
1991	3.96
1992	3.91
1993	3.86
1994	3.82
1995	3.79
1996	3.73
1997	3.68
1998	3.63
1999	3.57
2000	3.52
2001	3.44
2002	3.37
2003	3.3
2004	3.25
2005	3.19
2006	3.13
2007	3.08
2008	3.04
2009	3
2010	2.97
2011	2.97
2012	2.99
2013	3.02
2014	3.04
2015	3.06
2016	3.09