Year	Cases per 100,000
1990	4.53
1991	4.52
1992	4.5
1993	4.49
1994	4.48
1995	4.47
1996	4.4
1997	4.34
1998	4.28
1999	4.21
2000	4.15
2001	4.2
2002	4.25
2003	4.3
2004	4.35
2005	4.4
2006	4.42
2007	4.43
2008	4.44
2009	4.46
2010	4.48
2011	4.5
2012	4.53
2013	4.56
2014	4.6
2015	4.63
2016	4.66