Year	Cases per 100,000
1990	5.25
1991	5.39
1992	5.42
1993	5.23
1994	5.2
1995	5.36
1996	5.29
1997	5.43
1998	5.32
1999	5.27
2000	5.31
2001	5.22
2002	5.17
2003	5.16
2004	5.06
2005	5.11
2006	5.19
2007	5.14
2008	5.12
2009	5.1
2010	5.17
2011	5.21
2012	5.27
2013	5.3
2014	5.31
2015	5.36
2016	5.4