Year	Cases per 100,000
1990	2.23
1991	2.23
1992	2.24
1993	2.24
1994	2.25
1995	2.25
1996	2.26
1997	2.26
1998	2.27
1999	2.27
2000	2.28
2001	2.28
2002	2.28
2003	2.28
2004	2.28
2005	2.28
2006	2.28
2007	2.27
2008	2.27
2009	2.27
2010	2.27
2011	2.26
2012	2.25
2013	2.25
2014	2.24
2015	2.24
2016	2.23