Year	Cases per 100,000
1990	9.56
1991	9.31
1992	9.04
1993	8.53
1994	8.52
1995	8.15
1996	7.96
1997	7.57
1998	7.48
1999	7.55
2000	7.57
2001	7.3
2002	7.23
2003	7.02
2004	6.83
2005	6.53
2006	6.35
2007	5.88
2008	5.89
2009	5.82
2010	5.87
2011	5.82
2012	5.71
2013	5.66
2014	5.95
2015	6.06
2016	6.19