Year	Cases per 100,000
1990	3.49
1991	3.53
1992	3.57
1993	3.61
1994	3.66
1995	3.7
1996	3.63
1997	3.56
1998	3.49
1999	3.43
2000	3.37
2001	3.34
2002	3.32
2003	3.3
2004	3.28
2005	3.27
2006	3.26
2007	3.25
2008	3.24
2009	3.24
2010	3.23
2011	3.22
2012	3.21
2013	3.2
2014	3.19
2015	3.18
2016	3.17