Year	Cases per 100,000
1990	14.87
1991	14.57
1992	14.34
1993	14.31
1994	14.25
1995	14.07
1996	13.88
1997	13.61
1998	13.4
1999	13.17
2000	12.93
2001	12.56
2002	12.22
2003	11.83
2004	11.46
2005	11.04
2006	10.59
2007	10.19
2008	9.81
2009	9.5
2010	9.26
2011	9
2012	8.73
2013	8.49
2014	8.27
2015	8.06
2016	7.87