Year	Cases per 100,000
1990	25.45
1991	24.57
1992	24.82
1993	27.16
1994	27.85
1995	25.39
1996	22.64
1997	20.5
1998	19.41
1999	19.83
2000	19.65
2001	19.21
2002	18.99
2003	18.77
2004	18.27
2005	18.08
2006	16.97
2007	16.54
2008	16.52
2009	15.7
2010	15.52
2011	14.92
2012	14.28
2013	13.98
2014	13.97
2015	14.15
2016	14.53