Year	Cases per 100,000
1990	7.9
1991	7.81
1992	7.8
1993	7.82
1994	7.84
1995	7.87
1996	7.87
1997	7.88
1998	7.87
1999	7.89
2000	7.82
2001	7.7
2002	7.48
2003	7.5
2004	7.45
2005	7.69
2006	7.93
2007	8.15
2008	8.35
2009	8.11
2010	7.95
2011	7.87
2012	7.89
2013	7.91
2014	7.9
2015	7.9
2016	7.92