Year	Cases per 100,000
1990	5.27
1991	5.27
1992	5.28
1993	5.28
1994	5.29
1995	5.29
1996	5.3
1997	5.3
1998	5.31
1999	5.32
2000	5.33
2001	5.36
2002	5.41
2003	5.45
2004	5.5
2005	5.55
2006	5.55
2007	5.55
2008	5.55
2009	5.55
2010	5.55
2011	5.49
2012	5.43
2013	5.37
2014	5.32
2015	5.26
2016	5.21