Year	Cases per 100,000
1990	17.56
1991	17.55
1992	17.56
1993	17.57
1994	17.57
1995	17.59
1996	17.48
1997	17.39
1998	17.29
1999	17.2
2000	17.11
2001	16.98
2002	16.86
2003	16.75
2004	16.63
2005	16.53
2006	16.28
2007	16.04
2008	15.81
2009	15.58
2010	15.37
2011	15.4
2012	15.44
2013	15.48
2014	15.52
2015	15.56
2016	15.6