Year	Cases per 100,000
1990	11.45
1991	11.21
1992	10.98
1993	10.77
1994	10.56
1995	10.37
1996	9.88
1997	9.43
1998	9
1999	8.59
2000	8.22
2001	7.73
2002	7.27
2003	6.85
2004	6.45
2005	6.07
2006	5.89
2007	5.71
2008	5.54
2009	5.37
2010	5.22
2011	5.26
2012	5.32
2013	5.37
2014	5.43
2015	5.5
2016	5.56