Year	Cases per 100,000
1990	4.21
1991	4.2
1992	4.19
1993	4.18
1994	4.18
1995	4.17
1996	4.24
1997	4.31
1998	4.38
1999	4.46
2000	4.54
2001	4.5
2002	4.46
2003	4.42
2004	4.38
2005	4.35
2006	4.28
2007	4.21
2008	4.15
2009	4.09
2010	4.03
2011	4.05
2012	4.07
2013	4.1
2014	4.12
2015	4.14
2016	4.17