Year	Cases per 100,000
1990	5.18
1991	5.18
1992	5.19
1993	5.2
1994	5.2
1995	5.21
1996	5.37
1997	5.53
1998	5.7
1999	5.88
2000	6.06
2001	6.15
2002	6.24
2003	6.33
2004	6.42
2005	6.52
2006	6.51
2007	6.49
2008	6.47
2009	6.46
2010	6.44
2011	6.41
2012	6.38
2013	6.34
2014	6.31
2015	6.28
2016	6.25