Year	Cases per 100,000
1990	9.51
1991	9.45
1992	9.39
1993	9.34
1994	9.29
1995	9.25
1996	9.23
1997	9.22
1998	9.21
1999	9.2
2000	9.2
2001	9.16
2002	9.13
2003	9.1
2004	9.07
2005	9.05
2006	9.05
2007	9.05
2008	9.05
2009	9.05
2010	9.06
2011	9.04
2012	9.03
2013	9.01
2014	9
2015	8.98
2016	8.98