Year	Cases per 100,000
1990	1.5
1991	1.65
1992	1.81
1993	2
1994	2.2
1995	2.42
1996	2.6
1997	2.79
1998	2.99
1999	3.22
2000	3.46
2001	3.41
2002	3.38
2003	3.34
2004	3.3
2005	3.26
2006	3.29
2007	3.3
2008	3.33
2009	3.35
2010	3.37
2011	3.37
2012	3.36
2013	3.36
2014	3.35
2015	3.35
2016	3.35