Year	Cases per 100,000
1990	19.48
1991	18.98
1992	18.22
1993	17.58
1994	17.42
1995	17.18
1996	16.67
1997	16.62
1998	16.76
1999	16.38
2000	16.13
2001	16.03
2002	15.59
2003	14.78
2004	14.17
2005	13.78
2006	13.66
2007	13.67
2008	13.54
2009	13.19
2010	12.71
2011	12.33
2012	12.03
2013	11.74
2014	11.63
2015	11.76
2016	11.87