Year	Cases per 100,000
1990	3.58
1991	3.58
1992	3.59
1993	3.6
1994	3.61
1995	3.63
1996	3.61
1997	3.6
1998	3.59
1999	3.58
2000	3.57
2001	3.55
2002	3.54
2003	3.53
2004	3.52
2005	3.51
2006	3.48
2007	3.45
2008	3.43
2009	3.4
2010	3.38
2011	3.36
2012	3.33
2013	3.31
2014	3.29
2015	3.27
2016	3.25