Year	Cases per 100,000
1990	8.8
1991	9.2
1992	9.63
1993	10.09
1994	10.57
1995	11.08
1996	10.66
1997	10.27
1998	9.9
1999	9.54
2000	9.21
2001	8.9
2002	8.61
2003	8.34
2004	8.08
2005	7.84
2006	7.87
2007	7.9
2008	7.94
2009	7.97
2010	8.01
2011	8.13
2012	8.25
2013	8.37
2014	8.49
2015	8.61
2016	8.74