Year	Cases per 100,000
1990	7.67
1991	7.69
1992	7.71
1993	7.74
1994	7.76
1995	7.8
1996	7.74
1997	7.69
1998	7.63
1999	7.58
2000	7.54
2001	7.47
2002	7.4
2003	7.34
2004	7.28
2005	7.23
2006	7.21
2007	7.18
2008	7.16
2009	7.15
2010	7.13
2011	7.08
2012	7.02
2013	6.97
2014	6.92
2015	6.87
2016	6.83