Year	Cases per 100,000
1990	8.68
1991	8.62
1992	8.57
1993	8.51
1994	8.46
1995	8.42
1996	8.38
1997	8.35
1998	8.32
1999	8.28
2000	8.26
2001	8.22
2002	8.2
2003	8.17
2004	8.14
2005	8.12
2006	8.1
2007	8.08
2008	8.06
2009	8.04
2010	8.03
2011	8.02
2012	8.01
2013	8.01
2014	8
2015	8
2016	8