Year	Cases per 100,000
1990	9.45
1991	9.35
1992	9.4
1993	9.31
1994	9.19
1995	9.07
1996	9.05
1997	9.06
1998	8.75
1999	8.53
2000	8.38
2001	7.83
2002	7.57
2003	7.24
2004	7
2005	6.88
2006	6.66
2007	6.64
2008	6.45
2009	6.44
2010	6.45
2011	6.35
2012	6.27
2013	6.2
2014	6.34
2015	6.55
2016	6.58