Year	Cases per 100,000
1990	6.06
1991	6.06
1992	6.05
1993	6.05
1994	6.05
1995	6.07
1996	6.04
1997	6.03
1998	6
1999	5.96
2000	5.92
2001	5.9
2002	5.89
2003	5.9
2004	5.9
2005	5.9
2006	5.91
2007	5.91
2008	5.92
2009	5.94
2010	5.96
2011	5.98
2012	6
2013	6.01
2014	6.04
2015	6.06
2016	6.08