Year	Cases per 100,000
1990	18.68
1991	18.31
1992	17.83
1993	17.37
1994	16.87
1995	16.5
1996	16.03
1997	15.54
1998	15.1
1999	14.42
2000	13.99
2001	13.48
2002	13.07
2003	12.7
2004	12.15
2005	12.01
2006	11.92
2007	11.89
2008	11.86
2009	11.87
2010	11.77
2011	11.79
2012	11.82
2013	11.75
2014	11.77
2015	11.77
2016	11.79