Year	Cases per 100,000
1990	14.95
1991	14.43
1992	13.89
1993	13.44
1994	13.19
1995	12.84
1996	12.48
1997	12.4
1998	11.22
1999	10.61
2000	9.83
2001	9.48
2002	8.8
2003	8.57
2004	8.1
2005	7.87
2006	7.68
2007	7.51
2008	7.45
2009	7.53
2010	7.38
2011	7.04
2012	6.77
2013	6.6
2014	6.31
2015	6.18
2016	6.03