Year	Cases per 100,000
1983	1.405
1984	1.16
1985	0.915
1986	1.14
1987	1.935
1988	1.77
1989	1.835
1990	1.44
1991	1.5
1992	1.57
1993	1.65
1994	1.73
1995	1.82
1996	1.88
1997	1.95
1998	2.02
1999	2.1
2000	2.18
2001	2.21
2002	2.24
2003	2.28
2004	2.31
2005	2.35
2006	2.39
2007	2.42
2008	2.46
2009	2.5
2010	2.55
2011	2.55
2012	2.55
2013	2.56
2014	2.56
2015	2.56
2016	2.57