Year	Cases per 100,000
1990	9.42
1991	9.38
1992	9.36
1993	9.33
1994	9.31
1995	9.29
1996	9.19
1997	9.11
1998	9.02
1999	8.93
2000	8.85
2001	8.69
2002	8.54
2003	8.39
2004	8.25
2005	8.11
2006	8.04
2007	7.97
2008	7.9
2009	7.83
2010	7.76
2011	7.7
2012	7.64
2013	7.59
2014	7.53
2015	7.48
2016	7.43