Year	Cases per 100,000
1990	14.31
1991	13.53
1992	13.38
1993	13.14
1994	12.94
1995	13.08
1996	12.5
1997	11.73
1998	11.11
1999	10.44
2000	10.23
2001	9.83
2002	9.16
2003	8.89
2004	8.63
2005	8.37
2006	8.07
2007	7.83
2008	7.78
2009	7.6
2010	7.28
2011	7.15
2012	7.01
2013	6.92
2014	6.77
2015	6.61
2016	6.48