Year	Cases per 100,000
1990	13.59
1991	14.14
1992	12.87
1993	13.12
1994	14.03
1995	13.78
1996	12.47
1997	10.5
1998	9.71
1999	9.6
2000	9.68
2001	9.28
2002	9.34
2003	9.34
2004	9.14
2005	9.67
2006	9.4
2007	9.21
2008	8.86
2009	8.55
2010	8.62
2011	7.61
2012	7.59
2013	7.12
2014	7.35
2015	7.24
2016	7.06