Year	Cases per 100,000
1990	4.36
1991	4.32
1992	4.28
1993	4.24
1994	4.2
1995	4.17
1996	4.18
1997	4.2
1998	4.22
1999	4.29
2000	4.35
2001	4.36
2002	4.37
2003	4.38
2004	4.37
2005	4.38
2006	4.4
2007	4.44
2008	4.46
2009	4.48
2010	4.5
2011	4.53
2012	4.56
2013	4.58
2014	4.61
2015	4.64
2016	4.67