Year	Cases per 100,000
1990	7.66
1991	7.79
1992	8.01
1993	8.25
1994	8.48
1995	8.78
1996	8.67
1997	8.49
1998	8.42
1999	8.33
2000	8.28
2001	8.17
2002	8.02
2003	7.9
2004	7.86
2005	7.7
2006	7.67
2007	7.59
2008	7.53
2009	7.49
2010	7.48
2011	7.45
2012	7.44
2013	7.42
2014	7.39
2015	7.35
2016	7.31