Year	Cases per 100,000
1990	8.8
1991	8.63
1992	8.46
1993	8.17
1994	8.14
1995	7.78
1996	7.59
1997	7.41
1998	7.34
1999	7.58
2000	7.64
2001	7.79
2002	7.86
2003	7.94
2004	8.09
2005	8.21
2006	8.33
2007	8.42
2008	8.54
2009	8.62
2010	8.66
2011	8.67
2012	8.67
2013	8.65
2014	8.61
2015	8.57
2016	8.52