Year	Cases per 100,000
1990	8.31
1991	8.17
1992	8.03
1993	7.9
1994	7.78
1995	7.66
1996	7.92
1997	8.19
1998	8.47
1999	8.76
2000	9.07
2001	9.43
2002	9.82
2003	10.22
2004	10.64
2005	11.09
2006	10.8
2007	10.51
2008	10.24
2009	9.97
2010	9.72
2011	9.57
2012	9.43
2013	9.28
2014	9.14
2015	9.01
2016	8.88