Year	Cases per 100,000
1990	8.45
1991	8.37
1992	8.25
1993	8.29
1994	8.35
1995	7.89
1996	7.54
1997	7.24
1998	6.96
1999	6.71
2000	6.46
2001	6.21
2002	5.99
2003	5.78
2004	5.78
2005	5.6
2006	5.5
2007	5.39
2008	5.39
2009	5.46
2010	5.46
2011	5.48
2012	5.51
2013	5.52
2014	5.54
2015	5.57
2016	5.59