Year	Cases per 100,000
1990	8.44
1991	8.16
1992	7.97
1993	7.67
1994	7.53
1995	7.47
1996	7.38
1997	7.13
1998	6.99
1999	7.08
2000	7.23
2001	7.36
2002	7.46
2003	7.54
2004	7.67
2005	7.73
2006	7.82
2007	7.9
2008	8
2009	8.17
2010	8.27
2011	8.35
2012	8.42
2013	8.45
2014	8.43
2015	8.41
2016	8.39