Year	Cases per 100,000
1990	9.43
1991	9.46
1992	8.57
1993	8.78
1994	8.99
1995	8.9
1996	8.4
1997	7.62
1998	7.03
1999	6.93
2000	6.76
2001	6.85
2002	6.82
2003	6.96
2004	6.85
2005	7.03
2006	7.15
2007	7.28
2008	7.29
2009	7.3
2010	7.5
2011	6.92
2012	6.93
2013	6.71
2014	6.83
2015	6.74
2016	6.56