Year	Cases per 100,000
1990	8.24
1991	8.21
1992	8.18
1993	8.16
1994	8.13
1995	8.11
1996	8.11
1997	8.11
1998	8.11
1999	8.11
2000	8.12
2001	8.14
2002	8.17
2003	8.21
2004	8.24
2005	8.28
2006	8.31
2007	8.33
2008	8.36
2009	8.38
2010	8.42
2011	8.43
2012	8.44
2013	8.45
2014	8.47
2015	8.48
2016	8.5