Year	Cases per 100,000
1990	5.16
1991	5.07
1992	4.98
1993	4.89
1994	4.8
1995	4.72
1996	4.59
1997	4.48
1998	4.36
1999	4.25
2000	4.15
2001	4.11
2002	4.08
2003	4.05
2004	4.02
2005	3.99
2006	4.01
2007	4.03
2008	4.04
2009	4.06
2010	4.08
2011	4.1
2012	4.12
2013	4.13
2014	4.15
2015	4.17
2016	4.19