Year	Cases per 100,000
1990	9.21
1991	8.7
1992	8.58
1993	9.36
1994	8.67
1995	8.89
1996	9.1
1997	9.14
1998	9
1999	7.71
2000	7.81
2001	7.83
2002	7.35
2003	7.67
2004	7.36
2005	7.9
2006	8.3
2007	8.61
2008	8.83
2009	8.73
2010	8.91
2011	7.99
2012	7.64
2013	7.15
2014	6.98
2015	6.94
2016	6.86