Year	Cases per 100,000
1990	4.68
1991	4.68
1992	4.61
1993	4.57
1994	4.53
1995	4.5
1996	4.45
1997	4.41
1998	4.36
1999	4.35
2000	4.34
2001	4.32
2002	4.29
2003	4.3
2004	4.44
2005	4.45
2006	4.44
2007	4.38
2008	4.32
2009	4.25
2010	4.18
2011	4.1
2012	4.01
2013	3.87
2014	3.77
2015	3.65
2016	3.61