Year	Cases per 100,000
1990	8.42
1991	8.22
1992	7.96
1993	7.79
1994	7.6
1995	7.44
1996	7.19
1997	7.16
1998	7.01
1999	6.76
2000	6.67
2001	6.49
2002	6.4
2003	6.28
2004	6.22
2005	6.2
2006	6.13
2007	6.03
2008	5.92
2009	5.85
2010	5.74
2011	5.68
2012	5.57
2013	5.43
2014	5.26
2015	5.19
2016	5.14