Year	Cases per 100,000
1990	17.21
1991	17.57
1992	17.63
1993	17.71
1994	17.84
1995	17.77
1996	18.2
1997	18.61
1998	18.74
1999	19.16
2000	19.52
2001	19.64
2002	19.56
2003	19.25
2004	18.8
2005	18.44
2006	18.06
2007	17.98
2008	17.72
2009	17.39
2010	17.01
2011	16.64
2012	16.54
2013	16.97
2014	16.65
2015	16.32
2016	16.12