Year	Cases per 100,000
1990	7.7
1991	7.72
1992	7.74
1993	7.76
1994	7.79
1995	7.81
1996	7.44
1997	7.09
1998	6.75
1999	6.44
2000	6.14
2001	6.15
2002	6.17
2003	6.19
2004	6.21
2005	6.23
2006	6.23
2007	6.22
2008	6.21
2009	6.2
2010	6.2
2011	6.32
2012	6.44
2013	6.56
2014	6.69
2015	6.82
2016	6.95