Year	Cases per 100,000
1990	11.98
1991	12.33
1992	12.47
1993	12.6
1994	12.46
1995	12.4
1996	11.26
1997	10.29
1998	9.41
1999	9.01
2000	8.58
2001	8.2
2002	7.95
2003	7.8
2004	7.77
2005	7.67
2006	7.44
2007	7.56
2008	7.66
2009	7.3
2010	7.13
2011	7.11
2012	7.34
2013	7.43
2014	7.21
2015	7.24
2016	7.29