Year	Cases per 100,000
1990	5.15
1991	5.13
1992	5.12
1993	5.09
1994	5.07
1995	5.05
1996	5.03
1997	5
1998	4.98
1999	5
2000	5
2001	4.97
2002	4.94
2003	4.97
2004	5.1
2005	5.18
2006	5.31
2007	5.33
2008	5.21
2009	5.25
2010	5.27
2011	5.36
2012	5.38
2013	5.42
2014	5.47
2015	5.52
2016	5.56