Year	Cases per 100,000
1990	5.09
1991	4.98
1992	4.97
1993	4.86
1994	4.89
1995	4.99
1996	5.11
1997	5.09
1998	5.15
1999	5.23
2000	5.32
2001	5.23
2002	5.24
2003	5.24
2004	5.19
2005	5.08
2006	4.92
2007	4.73
2008	4.68
2009	4.62
2010	4.48
2011	4.35
2012	4.19
2013	4.12
2014	4.04
2015	3.98
2016	3.92