Year	Cases per 100,000
1990	4.27
1991	4.25
1992	4.24
1993	4.15
1994	4.07
1995	3.99
1996	3.85
1997	3.73
1998	3.71
1999	3.7
2000	3.61
2001	3.55
2002	3.6
2003	3.41
2004	3.35
2005	3.29
2006	3.28
2007	3.3
2008	3.23
2009	3.24
2010	3.16
2011	3.08
2012	3.1
2013	3.08
2014	3.06
2015	3.03
2016	3