Year	Cases per 100,000
1990	7.79
1991	7.76
1992	7.75
1993	7.73
1994	7.72
1995	7.71
1996	7.68
1997	7.66
1998	7.63
1999	7.61
2000	7.59
2001	7.54
2002	7.5
2003	7.46
2004	7.42
2005	7.39
2006	7.35
2007	7.3
2008	7.26
2009	7.22
2010	7.19
2011	7.17
2012	7.16
2013	7.16
2014	7.15
2015	7.14
2016	7.13