Year	Cases per 100,000
1990	6.48
1991	6.46
1992	6.44
1993	6.43
1994	6.41
1995	6.4
1996	6.31
1997	6.22
1998	6.13
1999	6.05
2000	5.97
2001	5.96
2002	5.95
2003	5.95
2004	5.94
2005	5.94
2006	5.92
2007	5.89
2008	5.87
2009	5.85
2010	5.83
2011	5.81
2012	5.78
2013	5.76
2014	5.74
2015	5.72
2016	5.7