Year	Cases per 100,000
1990	8.81
1991	8.73
1992	8.65
1993	8.57
1994	8.49
1995	8.42
1996	8.31
1997	8.22
1998	8.12
1999	8.03
2000	7.95
2001	7.91
2002	7.87
2003	7.84
2004	7.8
2005	7.78
2006	7.75
2007	7.71
2008	7.69
2009	7.66
2010	7.64
2011	7.62
2012	7.61
2013	7.6
2014	7.59
2015	7.58
2016	7.58