Year	Cases per 100,000
1990	3.47
1991	3.36
1992	3.25
1993	3.14
1994	3.04
1995	2.93
1996	2.92
1997	2.9
1998	2.88
1999	2.88
2000	2.88
2001	2.86
2002	2.84
2003	2.82
2004	2.8
2005	2.78
2006	2.81
2007	2.84
2008	2.87
2009	2.9
2010	2.94
2011	2.95
2012	2.96
2013	2.97
2014	2.98
2015	2.98
2016	2.99