Year	Cases per 100,000
1990	6.86
1991	7.18
1992	7.52
1993	7.88
1994	8.25
1995	8.65
1996	8.5
1997	8.36
1998	8.22
1999	8.09
2000	7.96
2001	7.93
2002	7.91
2003	7.89
2004	7.86
2005	7.85
2006	7.65
2007	7.45
2008	7.26
2009	7.08
2010	6.9
2011	6.78
2012	6.67
2013	6.56
2014	6.45
2015	6.34
2016	6.24