Year	Cases per 100,000
1990	18.64
1991	18.39
1992	18.06
1993	17.96
1994	18.24
1995	18.08
1996	18.07
1997	18
1998	17.38
1999	17.12
2000	16.74
2001	16.58
2002	16.59
2003	16.31
2004	16.3
2005	16.32
2006	15.89
2007	15.68
2008	15.44
2009	15.22
2010	15.22
2011	15.25
2012	15.35
2013	15.23
2014	15.4
2015	15.25
2016	15.11