Year	Cases per 100,000
1990	7.97
1991	8.02
1992	8.07
1993	8.13
1994	8.19
1995	8.25
1996	8.19
1997	8.14
1998	8.08
1999	8.03
2000	7.99
2001	7.88
2002	7.77
2003	7.67
2004	7.58
2005	7.49
2006	7.58
2007	7.66
2008	7.75
2009	7.85
2010	7.95
2011	8.01
2012	8.08
2013	8.15
2014	8.22
2015	8.29
2016	8.37