Year	Cases per 100,000
1990	3.06
1991	3.06
1992	3.07
1993	3.08
1994	3.09
1995	3.1
1996	3.22
1997	3.36
1998	3.5
1999	3.64
2000	3.8
2001	3.96
2002	4.13
2003	4.3
2004	4.49
2005	4.68
2006	4.64
2007	4.6
2008	4.56
2009	4.52
2010	4.48
2011	4.46
2012	4.44
2013	4.42
2014	4.41
2015	4.39
2016	4.38