Year	Cases per 100,000
1990	5
1991	5.01
1992	5.02
1993	5.03
1994	5.04
1995	5.05
1996	5.08
1997	5.12
1998	5.15
1999	5.19
2000	5.23
2001	5.27
2002	5.31
2003	5.36
2004	5.41
2005	5.46
2006	5.5
2007	5.53
2008	5.57
2009	5.61
2010	5.66
2011	5.65
2012	5.66
2013	5.66
2014	5.66
2015	5.66
2016	5.67