Year	Cases per 100,000
1990	5.64
1991	5.58
1992	5.53
1993	5.49
1994	5.44
1995	5.39
1996	5.21
1997	5.04
1998	4.87
1999	4.71
2000	4.56
2001	4.45
2002	4.35
2003	4.25
2004	4.15
2005	4.05
2006	3.99
2007	3.93
2008	3.88
2009	3.82
2010	3.77
2011	3.81
2012	3.84
2013	3.88
2014	3.92
2015	3.96
2016	4