Year	Cases per 100,000
1990	5.67
1991	5.82
1992	6
1993	6.14
1994	6.15
1995	6.05
1996	5.78
1997	5.96
1998	5.92
1999	6.16
2000	6.13
2001	6.2
2002	6.15
2003	6.16
2004	6.12
2005	5.98
2006	5.73
2007	5.58
2008	5.4
2009	5.25
2010	5.05
2011	4.92
2012	4.72
2013	4.69
2014	4.66
2015	4.71
2016	4.73