Year	Cases per 100,000
1990	3.72
1991	3.69
1992	3.65
1993	3.68
1994	3.68
1995	3.67
1996	3.63
1997	3.58
1998	3.51
1999	3.42
2000	3.35
2001	3.32
2002	3.29
2003	3.21
2004	3.2
2005	3.17
2006	3.17
2007	3.19
2008	3.14
2009	3.16
2010	3.16
2011	3.03
2012	2.96
2013	2.92
2014	2.88
2015	2.83
2016	2.78