Year	Cases per 100,000
1990	7.33
1991	7.29
1992	7.33
1993	7.3
1994	7.42
1995	7.56
1996	7.85
1997	8
1998	8.25
1999	8.6
2000	8.97
2001	8.73
2002	8.56
2003	8.7
2004	8.69
2005	8.59
2006	8.38
2007	8.11
2008	7.83
2009	7.44
2010	7.26
2011	7.13
2012	6.95
2013	6.88
2014	6.8
2015	6.74
2016	6.67