Year	Cases per 100,000
1990	5.19
1991	5.06
1992	4.93
1993	4.81
1994	4.69
1995	4.58
1996	4.51
1997	4.44
1998	4.38
1999	4.32
2000	4.26
2001	4.26
2002	4.26
2003	4.26
2004	4.26
2005	4.27
2006	4.21
2007	4.14
2008	4.09
2009	4.03
2010	3.97
2011	3.96
2012	3.94
2013	3.93
2014	3.91
2015	3.9
2016	3.88