Year	Cases per 100,000
1958	18.96
1959	18.87
1960	17.52
1961	15.31
1962	11.96
1963	22.48
1964	18.92
1965	24.49
1966	34.37
1967	22.74
1968	34.55
1969	15.83
1970	24.58
1971	17.978
1972	14.736
1973	17.994
1974	17.092
1975	12.6
1976	13.008
1977	3.896
1978	8.454
1979	12.932
1980	7.64
1981	18.768
1982	12.986
1983	18.654
1984	15.262
1985	18.66
1986	11.328
1987	11.386
1988	7.964
1989	10.742
1990	11.96
1991	12.08
1992	11.53
1993	11.04
1994	11.15
1995	10.99
1996	11.28
1997	11.16
1998	11.01
1999	10.58
2000	10.35
2001	10.26
2002	10.48
2003	10.27
2004	9.53
2005	8.91
2006	8.47
2007	8.07
2008	8.23
2009	8.08
2010	8.42
2011	8.36
2012	7.88
2013	7.73
2014	7.51
2015	7.35
2016	7.05