Year	Cases per 100,000
1990	6.19
1991	6.22
1992	6.35
1993	6.58
1994	6.78
1995	6.93
1996	7.15
1997	7.5
1998	7.75
1999	7.82
2000	7.82
2001	7.79
2002	7.72
2003	7.61
2004	7.53
2005	7.45
2006	7.56
2007	7.54
2008	7.55
2009	7.58
2010	7.5
2011	7.34
2012	7.19
2013	7.05
2014	6.9
2015	6.77
2016	6.65