Year	Cases per 100,000
1990	8.04
1991	8.12
1992	8.21
1993	8.29
1994	8.38
1995	8.47
1996	8.35
1997	8.24
1998	8.12
1999	8.01
2000	7.91
2001	7.83
2002	7.76
2003	7.68
2004	7.61
2005	7.54
2006	7.52
2007	7.5
2008	7.49
2009	7.47
2010	7.45
2011	7.41
2012	7.36
2013	7.32
2014	7.28
2015	7.24
2016	7.2