Year	Cases per 100,000
1990	1.78
1991	1.78
1992	1.78
1993	1.77
1994	1.77
1995	1.77
1996	1.79
1997	1.81
1998	1.83
1999	1.86
2000	1.88
2001	1.9
2002	1.91
2003	1.93
2004	1.95
2005	1.97
2006	1.97
2007	1.97
2008	1.97
2009	1.97
2010	1.98
2011	1.97
2012	1.97
2013	1.96
2014	1.96
2015	1.95
2016	1.95