Year	Cases per 100,000
1990	16.09
1991	16.05
1992	15.75
1993	15.58
1994	15.4
1995	15.29
1996	15.13
1997	15.07
1998	14.79
1999	14.58
2000	14.49
2001	14.46
2002	14.55
2003	14.47
2004	14.43
2005	14.14
2006	13.97
2007	13.85
2008	13.71
2009	13.48
2010	13.37
2011	13
2012	13.15
2013	13.16
2014	13
2015	12.27
2016	11.87