Year	Cases per 100,000
1990	4.88
1991	4.88
1992	4.88
1993	4.88
1994	4.88
1995	4.88
1996	4.84
1997	4.81
1998	4.77
1999	4.74
2000	4.7
2001	4.69
2002	4.68
2003	4.68
2004	4.67
2005	4.66
2006	4.72
2007	4.78
2008	4.84
2009	4.91
2010	4.97
2011	5.01
2012	5.06
2013	5.1
2014	5.14
2015	5.19
2016	5.23