Year	Cases per 100,000
1990	5.48
1991	5.48
1992	5.44
1993	5.48
1994	5.39
1995	5.16
1996	5.44
1997	5.77
1998	6.14
1999	6.5
2000	6.63
2001	6.63
2002	6.25
2003	5.95
2004	5.6
2005	5.35
2006	5.19
2007	4.91
2008	4.76
2009	4.53
2010	4.31
2011	4.17
2012	4.04
2013	3.87
2014	3.79
2015	3.82
2016	3.85