Year	Cases per 100,000
1990	5.85
1991	5.65
1992	5.5
1993	5.35
1994	5.29
1995	5.16
1996	5.07
1997	5.07
1998	5.01
1999	4.96
2000	4.91
2001	4.84
2002	4.75
2003	4.6
2004	4.33
2005	4.15
2006	4.13
2007	4.01
2008	3.87
2009	3.8
2010	3.74
2011	3.7
2012	3.64
2013	3.59
2014	3.53
2015	3.47
2016	3.41