Year	Cases per 100,000
1990	8.11
1991	7.8
1992	7.66
1993	7.62
1994	7.59
1995	7.55
1996	7.46
1997	7.41
1998	7.34
1999	7.27
2000	7.21
2001	7.19
2002	7.2
2003	7.2
2004	7.27
2005	7.06
2006	6.94
2007	6.82
2008	6.74
2009	6.55
2010	6.39
2011	6.21
2012	6.1
2013	5.99
2014	5.92
2015	5.87
2016	5.85