Year	Cases per 100,000
1990	6.59
1991	6.68
1992	6.67
1993	6.67
1994	6.77
1995	6.79
1996	7.09
1997	7.35
1998	7.6
1999	7.81
2000	7.91
2001	7.98
2002	7.99
2003	7.84
2004	7.58
2005	7.4
2006	7.08
2007	6.58
2008	6.05
2009	5.66
2010	5.29
2011	4.94
2012	4.75
2013	4.69
2014	4.67
2015	4.79
2016	4.88