Year	Cases per 100,000
1990	4.05
1991	4
1992	3.95
1993	3.89
1994	3.84
1995	3.8
1996	3.8
1997	3.8
1998	3.81
1999	3.81
2000	3.82
2001	3.86
2002	3.91
2003	3.96
2004	4.01
2005	4.06
2006	4.09
2007	4.12
2008	4.15
2009	4.18
2010	4.21
2011	4.24
2012	4.27
2013	4.3
2014	4.33
2015	4.36
2016	4.4