Year	Cases per 100,000
1990	14.78
1991	14.02
1992	14.3
1993	13.38
1994	12.4
1995	12.53
1996	12.69
1997	12.28
1998	12.26
1999	11.32
2000	10.69
2001	10.76
2002	10.04
2003	10.4
2004	10.38
2005	10.75
2006	10.95
2007	10.79
2008	11.1
2009	10.97
2010	10.93
2011	10.45
2012	9.97
2013	9.36
2014	8.84
2015	8.88
2016	8.52