Year	Cases per 100,000
1990	2.09
1991	2.1
1992	2.12
1993	2.13
1994	2.15
1995	2.17
1996	2.19
1997	2.21
1998	2.23
1999	2.26
2000	2.28
2001	2.29
2002	2.29
2003	2.3
2004	2.31
2005	2.32
2006	2.31
2007	2.3
2008	2.29
2009	2.29
2010	2.28
2011	2.28
2012	2.28
2013	2.29
2014	2.29
2015	2.29
2016	2.3