Year	Cases per 100,000
1990	7.33
1991	7.2
1992	7.08
1993	6.96
1994	6.85
1995	6.74
1996	6.58
1997	6.42
1998	6.27
1999	6.13
2000	5.99
2001	5.85
2002	5.71
2003	5.58
2004	5.46
2005	5.33
2006	5.22
2007	5.1
2008	4.98
2009	4.88
2010	4.77
2011	4.79
2012	4.81
2013	4.83
2014	4.85
2015	4.87
2016	4.9