Year	Cases per 100,000
1990	8.2
1991	8.16
1992	8.14
1993	8.11
1994	8.08
1995	8.06
1996	8
1997	7.93
1998	7.87
1999	7.81
2000	7.76
2001	7.73
2002	7.71
2003	7.68
2004	7.66
2005	7.64
2006	7.65
2007	7.65
2008	7.66
2009	7.67
2010	7.69
2011	7.68
2012	7.67
2013	7.67
2014	7.66
2015	7.66
2016	7.66