Year	Cases per 100,000
1990	16.95
1991	16.58
1992	16.11
1993	15.67
1994	15.45
1995	15.65
1996	16.05
1997	16.69
1998	16.78
1999	16.36
2000	15.39
2001	14.8
2002	14.85
2003	14.51
2004	14.39
2005	14.84
2006	14.22
2007	13.54
2008	13.21
2009	12.69
2010	11.97
2011	11.17
2012	10.51
2013	10
2014	9.92
2015	10.03
2016	10.24