Year	Cases per 100,000
1990	17.27
1991	17.02
1992	16.84
1993	16.75
1994	16.76
1995	17.01
1996	16.94
1997	17.28
1998	17.41
1999	18.12
2000	18.72
2001	18.6
2002	18.23
2003	18.88
2004	18.86
2005	18.53
2006	18.25
2007	17.23
2008	16.47
2009	16.55
2010	15.51
2011	14.86
2012	14.52
2013	14.21
2014	13.97
2015	13.77
2016	13.56