Year	Cases per 100,000
1990	4.48
1991	4.47
1992	4.46
1993	4.46
1994	4.46
1995	4.46
1996	4.45
1997	4.44
1998	4.43
1999	4.42
2000	4.42
2001	4.39
2002	4.36
2003	4.33
2004	4.31
2005	4.29
2006	4.29
2007	4.28
2008	4.28
2009	4.28
2010	4.29
2011	4.28
2012	4.28
2013	4.27
2014	4.27
2015	4.26
2016	4.27