Year	Cases per 100,000
1990	17.22
1991	17.16
1992	17.11
1993	17.06
1994	17.01
1995	16.97
1996	16.85
1997	16.74
1998	16.63
1999	16.52
2000	16.42
2001	16.38
2002	16.35
2003	16.32
2004	16.29
2005	16.27
2006	16.41
2007	16.54
2008	16.68
2009	16.83
2010	16.99
2011	17.01
2012	17.05
2013	17.08
2014	17.12
2015	17.16
2016	17.21