Year	Cases per 100,000
1990	5.5
1991	5.5
1992	5.5
1993	5.52
1994	5.54
1995	5.57
1996	5.57
1997	5.57
1998	5.59
1999	5.64
2000	5.68
2001	5.72
2002	5.75
2003	5.78
2004	5.8
2005	5.83
2006	5.87
2007	5.9
2008	5.94
2009	5.97
2010	6.01
2011	6.05
2012	6.09
2013	6.09
2014	6.08
2015	6.08
2016	6.08