Year	Cases per 100,000
1990	4.49
1991	4.46
1992	4.44
1993	4.43
1994	4.41
1995	4.4
1996	4.36
1997	4.4
1998	4.41
1999	4.43
2000	4.45
2001	4.42
2002	4.41
2003	4.36
2004	4.31
2005	4.23
2006	4.14
2007	4.14
2008	4.06
2009	4.02
2010	4
2011	4.05
2012	4.05
2013	4.07
2014	4.11
2015	4.14
2016	4.15