Year	Cases per 100,000
1990	11.65
1991	11.35
1992	11.04
1993	10.39
1994	9.58
1995	8.79
1996	8.04
1997	7.79
1998	7.7
1999	7.61
2000	7.61
2001	7.63
2002	7.93
2003	8.38
2004	8.6
2005	8.03
2006	7.51
2007	7.23
2008	7.42
2009	7.62
2010	7.74
2011	7.79
2012	7.93
2013	7.73
2014	7.72
2015	7.51
2016	7.3