Year	Cases per 100,000
1990	6
1991	6.01
1992	6.02
1993	6.03
1994	6.05
1995	6.06
1996	6.08
1997	6.1
1998	6.12
1999	6.14
2000	6.16
2001	6.18
2002	6.2
2003	6.22
2004	6.24
2005	6.26
2006	6.29
2007	6.32
2008	6.35
2009	6.38
2010	6.42
2011	6.45
2012	6.49
2013	6.54
2014	6.58
2015	6.62
2016	6.66