Year	Cases per 100,000
1990	6.16
1991	6.3
1992	6.45
1993	6.6
1994	6.75
1995	6.92
1996	6.9
1997	6.89
1998	6.88
1999	6.87
2000	6.87
2001	6.66
2002	6.46
2003	6.27
2004	6.08
2005	5.91
2006	5.8
2007	5.68
2008	5.58
2009	5.47
2010	5.37
2011	5.36
2012	5.35
2013	5.34
2014	5.33
2015	5.33
2016	5.32