Year	Cases per 100,000
1990	4.58
1991	4.62
1992	4.65
1993	4.69
1994	4.76
1995	4.84
1996	4.94
1997	5.07
1998	5.25
1999	5.38
2000	5.36
2001	5.32
2002	5.22
2003	5.14
2004	5
2005	4.95
2006	4.84
2007	4.74
2008	4.7
2009	4.56
2010	4.41
2011	4.31
2012	4.18
2013	3.96
2014	3.77
2015	3.62
2016	3.49