Year	Cases per 100,000
1990	6.14
1991	6.04
1992	5.88
1993	5.84
1994	5.8
1995	5.78
1996	5.79
1997	5.84
1998	5.88
1999	5.82
2000	5.73
2001	5.64
2002	5.54
2003	5.39
2004	5.19
2005	4.96
2006	4.83
2007	4.8
2008	4.88
2009	4.89
2010	4.81
2011	4.7
2012	4.7
2013	4.75
2014	4.81
2015	4.85
2016	4.84