Year	Cases per 100,000
1990	6.71
1991	6.72
1992	6.74
1993	6.75
1994	6.77
1995	6.79
1996	6.68
1997	6.59
1998	6.49
1999	6.4
2000	6.31
2001	6.16
2002	6.02
2003	5.88
2004	5.75
2005	5.62
2006	5.7
2007	5.78
2008	5.86
2009	5.95
2010	6.04
2011	5.99
2012	5.95
2013	5.91
2014	5.86
2015	5.82
2016	5.78