Year	Cases per 100,000
1990	7.67
1991	7.68
1992	7.7
1993	7.72
1994	7.74
1995	7.77
1996	7.72
1997	7.68
1998	7.63
1999	7.59
2000	7.55
2001	7.46
2002	7.37
2003	7.28
2004	7.19
2005	7.11
2006	6.98
2007	6.86
2008	6.74
2009	6.62
2010	6.51
2011	6.52
2012	6.54
2013	6.56
2014	6.58
2015	6.59
2016	6.61