Year	Cases per 100,000
1990	2.07
1991	2.15
1992	2.22
1993	2.3
1994	2.39
1995	2.48
1996	2.43
1997	2.39
1998	2.35
1999	2.31
2000	2.27
2001	2.34
2002	2.42
2003	2.5
2004	2.59
2005	2.68
2006	2.78
2007	2.88
2008	2.99
2009	3.1
2010	3.23
2011	3.24
2012	3.25
2013	3.26
2014	3.27
2015	3.28
2016	3.3