Year	Cases per 100,000
1990	14.08
1991	14.63
1992	15.35
1993	15.75
1994	16.22
1995	16.26
1996	16.49
1997	16.53
1998	15.93
1999	15.42
2000	14.9
2001	14.49
2002	14.44
2003	14.4
2004	14.1
2005	13.89
2006	13.6
2007	13.27
2008	12.98
2009	12.52
2010	12.21
2011	11.84
2012	11.76
2013	11.85
2014	11.78
2015	11.67
2016	11.59