Year	Cases per 100,000
1990	7.34
1991	7.34
1992	7.35
1993	7.36
1994	7.38
1995	7.4
1996	7.26
1997	7.14
1998	7.02
1999	6.9
2000	6.79
2001	6.62
2002	6.45
2003	6.29
2004	6.14
2005	5.99
2006	5.98
2007	5.96
2008	5.95
2009	5.94
2010	5.94
2011	5.95
2012	5.98
2013	6
2014	6.02
2015	6.05
2016	6.07