Year	Cases per 100,000
1990	5.9
1991	5.8
1992	5.72
1993	5.65
1994	5.58
1995	5.51
1996	5.41
1997	5.32
1998	5.21
1999	5.19
2000	5.16
2001	5.1
2002	5.05
2003	5.02
2004	4.99
2005	4.93
2006	4.91
2007	4.81
2008	5.18
2009	5.58
2010	5.4
2011	5.2
2012	5.01
2013	4.88
2014	4.76
2015	4.65
2016	4.53