Year	Cases per 100,000
1983	2.1175
1984	2.785
1985	2.5925
1986	2.71
1987	2.9875
1988	3.235
1989	3.5225
1990	3.92
1991	3.97
1992	4.02
1993	4.07
1994	4.13
1995	4.18
1996	4.14
1997	4.11
1998	4.07
1999	4.03
2000	4
2001	3.95
2002	3.9
2003	3.86
2004	3.81
2005	3.77
2006	3.7
2007	3.64
2008	3.58
2009	3.52
2010	3.46
2011	3.41
2012	3.36
2013	3.31
2014	3.26
2015	3.21
2016	3.17