Year	Cases per 100,000
1990	8.22
1991	8.19
1992	8.18
1993	8.16
1994	8.14
1995	8.13
1996	7.7
1997	7.29
1998	6.9
1999	6.54
2000	6.19
2001	6.02
2002	5.86
2003	5.7
2004	5.54
2005	5.39
2006	5.35
2007	5.31
2008	5.27
2009	5.23
2010	5.19
2011	5.28
2012	5.36
2013	5.45
2014	5.54
2015	5.63
2016	5.72