Year	Cases per 100,000
1990	3.5
1991	3.53
1992	3.56
1993	3.6
1994	3.63
1995	3.67
1996	3.67
1997	3.67
1998	3.67
1999	3.67
2000	3.67
2001	3.68
2002	3.68
2003	3.69
2004	3.7
2005	3.71
2006	3.71
2007	3.71
2008	3.71
2009	3.71
2010	3.71
2011	3.7
2012	3.7
2013	3.69
2014	3.69
2015	3.68
2016	3.68