Year	Cases per 100,000
1990	6.07
1991	6.05
1992	6.03
1993	6.01
1994	6
1995	5.98
1996	5.88
1997	5.78
1998	5.69
1999	5.6
2000	5.51
2001	5.45
2002	5.4
2003	5.35
2004	5.3
2005	5.25
2006	5.22
2007	5.2
2008	5.17
2009	5.15
2010	5.13
2011	5.17
2012	5.22
2013	5.26
2014	5.31
2015	5.36
2016	5.41