Year	Cases per 100,000
1990	5.58
1991	5.56
1992	5.55
1993	5.54
1994	5.53
1995	5.52
1996	5.51
1997	5.51
1998	5.5
1999	5.5
2000	5.5
2001	5.48
2002	5.47
2003	5.45
2004	5.44
2005	5.43
2006	5.42
2007	5.41
2008	5.4
2009	5.39
2010	5.39
2011	5.38
2012	5.37
2013	5.36
2014	5.35
2015	5.35
2016	5.35