Year	Cases per 100,000
1990	3.48
1991	3.63
1992	3.8
1993	3.97
1994	4.15
1995	4.34
1996	4.74
1997	5.19
1998	5.67
1999	6.2
2000	6.79
2001	6.37
2002	5.98
2003	5.62
2004	5.28
2005	4.96
2006	5.08
2007	5.2
2008	5.32
2009	5.45
2010	5.59
2011	5.41
2012	5.25
2013	5.09
2014	4.94
2015	4.79
2016	4.65