Year	Cases per 100,000
1990	3.58
1991	3.53
1992	3.46
1993	3.44
1994	3.41
1995	3.37
1996	3.32
1997	3.27
1998	3.22
1999	3.13
2000	3.06
2001	2.9
2002	2.8
2003	2.74
2004	2.67
2005	2.6
2006	2.54
2007	2.47
2008	2.42
2009	2.38
2010	2.35
2011	2.3
2012	2.28
2013	2.26
2014	2.24
2015	2.22
2016	2.2