Year	Cases per 100,000
1990	5.78
1991	5.82
1992	5.87
1993	5.93
1994	6
1995	6.07
1996	6.09
1997	6.12
1998	6.13
1999	6.05
2000	5.93
2001	5.79
2002	5.67
2003	5.56
2004	5.44
2005	5.33
2006	5.22
2007	5.12
2008	5.05
2009	4.99
2010	4.95
2011	4.93
2012	4.91
2013	4.9
2014	4.9
2015	4.9
2016	4.9