Year	Cases per 100,000
1990	7.58
1991	7.57
1992	7.58
1993	7.58
1994	7.58
1995	7.59
1996	7.54
1997	7.49
1998	7.45
1999	7.41
2000	7.37
2001	7.3
2002	7.24
2003	7.19
2004	7.13
2005	7.08
2006	7.06
2007	7.03
2008	7
2009	6.98
2010	6.97
2011	6.94
2012	6.91
2013	6.89
2014	6.86
2015	6.84
2016	6.82