Year	Cases per 100,000
1990	8.11
1991	7.95
1992	7.79
1993	7.63
1994	7.48
1995	7.34
1996	6.95
1997	6.58
1998	6.24
1999	5.91
2000	5.6
2001	5.55
2002	5.51
2003	5.46
2004	5.42
2005	5.38
2006	5.38
2007	5.38
2008	5.38
2009	5.39
2010	5.39
2011	5.44
2012	5.48
2013	5.53
2014	5.58
2015	5.63
2016	5.68