Year	Cases per 100,000
1990	8.08
1991	8.12
1992	8.16
1993	8.2
1994	8.24
1995	8.29
1996	8.21
1997	8.13
1998	8.06
1999	7.99
2000	7.93
2001	7.87
2002	7.81
2003	7.76
2004	7.7
2005	7.65
2006	7.63
2007	7.6
2008	7.58
2009	7.55
2010	7.53
2011	7.54
2012	7.56
2013	7.57
2014	7.59
2015	7.6
2016	7.63