Year	Cases per 100,000
1990	2.99
1991	2.95
1992	2.92
1993	2.89
1994	2.85
1995	2.82
1996	2.81
1997	2.81
1998	2.8
1999	2.8
2000	2.8
2001	2.78
2002	2.77
2003	2.76
2004	2.74
2005	2.73
2006	2.69
2007	2.64
2008	2.6
2009	2.56
2010	2.52
2011	2.53
2012	2.54
2013	2.55
2014	2.56
2015	2.58
2016	2.59