Year	Cases per 100,000
1990	7.08
1991	7.14
1992	7.2
1993	7.26
1994	7.33
1995	7.4
1996	7.42
1997	7.43
1998	7.45
1999	7.47
2000	7.49
2001	7.3
2002	7.14
2003	7.01
2004	6.9
2005	6.82
2006	6.78
2007	6.74
2008	6.71
2009	6.68
2010	6.65
2011	6.64
2012	6.63
2013	6.63
2014	6.62
2015	6.62
2016	6.62