Year	Cases per 100,000
1990	4.46
1991	4.5
1992	4.54
1993	4.58
1994	4.62
1995	4.66
1996	4.59
1997	4.52
1998	4.46
1999	4.4
2000	4.34
2001	4.28
2002	4.22
2003	4.17
2004	4.12
2005	4.07
2006	4.09
2007	4.12
2008	4.15
2009	4.18
2010	4.21
2011	4.24
2012	4.27
2013	4.3
2014	4.34
2015	4.37
2016	4.41