Year	Cases per 100,000
1990	4.93
1991	4.84
1992	4.9
1993	4.66
1994	4.7
1995	4.49
1996	4.71
1997	5.28
1998	5.34
1999	5.36
2000	5.42
2001	5.14
2002	5
2003	4.9
2004	4.79
2005	4.77
2006	4.74
2007	4.62
2008	4.48
2009	4.4
2010	4.33
2011	4.22
2012	4.02
2013	3.86
2014	3.79
2015	3.72
2016	3.69