Year	Cases per 100,000
1990	6.69
1991	6.68
1992	6.67
1993	6.66
1994	6.65
1995	6.64
1996	6.64
1997	6.64
1998	6.63
1999	6.63
2000	6.63
2001	6.52
2002	6.41
2003	6.3
2004	6.19
2005	6.09
2006	6.08
2007	6.06
2008	6.05
2009	6.04
2010	6.03
2011	6.1
2012	6.18
2013	6.25
2014	6.33
2015	6.41
2016	6.49