Year	Cases per 100,000
1990	8.56
1991	8.53
1992	8.5
1993	8.47
1994	8.45
1995	8.43
1996	8.23
1997	8.04
1998	7.85
1999	7.68
2000	7.51
2001	7.43
2002	7.36
2003	7.29
2004	7.23
2005	7.17
2006	7.16
2007	7.14
2008	7.13
2009	7.13
2010	7.13
2011	7.05
2012	6.97
2013	6.9
2014	6.83
2015	6.76
2016	6.7