Year	Cases per 100,000
1990	4.91
1991	4.89
1992	4.88
1993	4.87
1994	4.85
1995	4.84
1996	5.14
1997	5.47
1998	5.81
1999	6.19
2000	6.58
2001	6.58
2002	6.58
2003	6.58
2004	6.58
2005	6.58
2006	6.44
2007	6.29
2008	6.15
2009	6.02
2010	5.9
2011	5.81
2012	5.73
2013	5.65
2014	5.57
2015	5.49
2016	5.42