Year	Cases per 100,000
1990	6.78
1991	6.68
1992	6.58
1993	6.55
1994	6.41
1995	6.32
1996	6.27
1997	6.21
1998	6.15
1999	6.04
2000	5.97
2001	5.91
2002	5.91
2003	5.93
2004	5.9
2005	5.87
2006	5.82
2007	5.77
2008	5.76
2009	5.77
2010	5.78
2011	5.82
2012	5.85
2013	5.89
2014	5.93
2015	5.97
2016	6.01