Year	Cases per 100,000
1990	2.32
1991	2.31
1992	2.3
1993	2.29
1994	2.28
1995	2.27
1996	2.36
1997	2.46
1998	2.55
1999	2.66
2000	2.77
2001	2.93
2002	3.1
2003	3.28
2004	3.48
2005	3.68
2006	3.83
2007	3.99
2008	4.15
2009	4.32
2010	4.5
2011	4.48
2012	4.46
2013	4.44
2014	4.42
2015	4.4
2016	4.39