Year	Cases per 100,000
1990	3.17
1991	3.17
1992	3.17
1993	3.17
1994	3.17
1995	3.18
1996	3.18
1997	3.19
1998	3.2
1999	3.21
2000	3.22
2001	3.31
2002	3.4
2003	3.5
2004	3.6
2005	3.7
2006	3.74
2007	3.78
2008	3.82
2009	3.85
2010	3.9
2011	3.89
2012	3.89
2013	3.89
2014	3.89
2015	3.89
2016	3.9