Year	Cases per 100,000
1990	6.82
1991	6.91
1992	6.92
1993	7.08
1994	7.12
1995	7.18
1996	6.46
1997	5.91
1998	5.45
1999	5.18
2000	4.9
2001	4.58
2002	4.79
2003	4.86
2004	4.77
2005	4.61
2006	4.49
2007	4.3
2008	4.25
2009	4.11
2010	3.94
2011	3.88
2012	3.86
2013	3.75
2014	3.82
2015	3.8
2016	3.82