Year	Cases per 100,000
1990	4.9
1991	5.04
1992	5.2
1993	5.36
1994	5.54
1995	5.72
1996	5.7
1997	5.68
1998	5.67
1999	5.65
2000	5.64
2001	5.57
2002	5.5
2003	5.43
2004	5.37
2005	5.3
2006	5.28
2007	5.26
2008	5.24
2009	5.22
2010	5.21
2011	5.21
2012	5.22
2013	5.22
2014	5.23
2015	5.23
2016	5.24