Year	Cases per 100,000
1990	27.44
1991	26.68
1992	26.19
1993	25.52
1994	24.15
1995	22.93
1996	22.76
1997	21.83
1998	20.68
1999	19.5
2000	18.13
2001	16.85
2002	16.52
2003	16.01
2004	15.81
2005	16.03
2006	15.74
2007	15.93
2008	16.16
2009	16.1
2010	16.08
2011	16.33
2012	16.47
2013	16.44
2014	16.39
2015	15.82
2016	15.54