Year	Cases per 100,000
1983	81.92
1984	85.43
1985	86.23
1986	87.15
1987	93.72
1988	93.92
1989	97.26
1990	99.26
1991	98.41
1992	96.42
1993	95
1994	92.81
1995	91.39
1996	89.71
1997	87.45
1998	85.63
1999	83.82
2000	82.37
2001	80.46
2002	79.48
2003	78.2
2004	76.85
2005	75.13
2006	73.5
2007	72.06
2008	70.71
2009	69.82
2010	68.55
2011	66.37
2012	64.29
2013	61.95
2014	58.96
2015	56.51
2016	55.79