Year	Cases per 100,000
1990	17.57
1991	17.8
1992	17.92
1993	17.93
1994	18.13
1995	18.3
1996	18.47
1997	18.54
1998	18.64
1999	18.8
2000	18.96
2001	19.01
2002	19.04
2003	19.06
2004	19.08
2005	19.07
2006	19.02
2007	18.92
2008	18.8
2009	18.69
2010	18.66
2011	18.65
2012	18.64
2013	18.63
2014	18.6
2015	18.54
2016	18.54