Year	Cases per 100,000
1990	7.24
1991	7.51
1992	7.65
1993	7.76
1994	7.58
1995	7.52
1996	7.2
1997	7.02
1998	6.68
1999	6.29
2000	6.04
2001	5.93
2002	5.76
2003	5.58
2004	5.56
2005	5.51
2006	5.42
2007	5.33
2008	5.33
2009	5.37
2010	5.41
2011	5.44
2012	5.26
2013	5.18
2014	5.14
2015	5.26
2016	5.36