Year	Cases per 100,000
1990	8.7
1991	8.73
1992	8.77
1993	8.8
1994	8.82
1995	8.84
1996	8.59
1997	8.34
1998	8.11
1999	7.83
2000	7.57
2001	7.54
2002	7.51
2003	7.48
2004	7.57
2005	7.71
2006	7.82
2007	7.88
2008	7.93
2009	7.95
2010	7.98
2011	8.05
2012	8.12
2013	8.17
2014	8.2
2015	8.21
2016	8.21