Year	Cases per 100,000
1990	8.95
1991	8.77
1992	8.58
1993	8.47
1994	8.17
1995	7.95
1996	7.75
1997	7.57
1998	7.4
1999	7.24
2000	7.07
2001	6.94
2002	6.75
2003	6.64
2004	6.53
2005	6.43
2006	6.32
2007	6.21
2008	6.1
2009	6
2010	5.9
2011	5.81
2012	5.72
2013	5.64
2014	5.57
2015	5.5
2016	5.44