Year	Cases per 100,000
1990	8.39
1991	8.4
1992	8.46
1993	8.51
1994	8.6
1995	8.68
1996	8.75
1997	8.82
1998	8.9
1999	8.82
2000	8.72
2001	8.58
2002	8.45
2003	8.32
2004	8.18
2005	8.04
2006	7.89
2007	7.75
2008	7.62
2009	7.51
2010	7.41
2011	7.31
2012	7.22
2013	7.15
2014	7.07
2015	7
2016	6.93