Year	Cases per 100,000
1990	6.87
1991	6.78
1992	6.69
1993	6.6
1994	6.52
1995	6.44
1996	6.38
1997	6.32
1998	6.26
1999	6.2
2000	6.15
2001	6.12
2002	6.1
2003	6.08
2004	6.06
2005	6.04
2006	5.99
2007	5.93
2008	5.88
2009	5.83
2010	5.79
2011	5.82
2012	5.85
2013	5.88
2014	5.92
2015	5.95
2016	5.99