Year	Cases per 100,000
1990	6.24
1991	6.24
1992	6.24
1993	6.25
1994	6.25
1995	6.26
1996	6.25
1997	6.24
1998	6.24
1999	6.23
2000	6.23
2001	6.24
2002	6.25
2003	6.27
2004	6.28
2005	6.3
2006	6.32
2007	6.33
2008	6.35
2009	6.37
2010	6.39
2011	6.4
2012	6.41
2013	6.43
2014	6.44
2015	6.45
2016	6.47