Year	Cases per 100,000
1990	21.65
1991	22.74
1992	20.82
1993	21.4
1994	22.61
1995	22.83
1996	21.4
1997	18.13
1998	17.3
1999	17.42
2000	17.46
2001	17.36
2002	17.08
2003	17.51
2004	17.04
2005	18.12
2006	18.15
2007	17.45
2008	16.96
2009	16.46
2010	17.04
2011	14.66
2012	14.68
2013	14.01
2014	14.53
2015	14.35
2016	13.92