Year	Cases per 100,000
1990	4.4
1991	4.29
1992	4.19
1993	4.09
1994	4
1995	3.9
1996	3.81
1997	3.73
1998	3.64
1999	3.56
2000	3.48
2001	3.4
2002	3.32
2003	3.25
2004	3.18
2005	3.11
2006	3.21
2007	3.31
2008	3.42
2009	3.53
2010	3.65
2011	3.71
2012	3.77
2013	3.83
2014	3.9
2015	3.96
2016	4.03