Year	Cases per 100,000
1990	6.67
1991	6.63
1992	6.6
1993	6.58
1994	6.55
1995	6.53
1996	6.49
1997	6.46
1998	6.43
1999	6.4
2000	6.38
2001	6.34
2002	6.3
2003	6.27
2004	6.24
2005	6.22
2006	6.16
2007	6.09
2008	6.04
2009	5.98
2010	5.93
2011	5.9
2012	5.88
2013	5.86
2014	5.84
2015	5.82
2016	5.81