Year	Cases per 100,000
1958	18.33
1959	18.06
1960	16.48
1961	16.74
1962	17.81
1963	15.73
1964	17.48
1965	20.04
1966	19.04
1967	18.89
1968	17.99
1969	16.89
1970	15.11
1971	15.039
1972	14.438
1973	12.717
1974	12.056
1975	12.025
1976	11.924
1977	11.643
1978	12.072
1979	10.601
1980	10.29
1981	11.939
1982	11.738
1983	11.047
1984	11.166
1985	10.795
1986	10.474
1987	10.663
1988	10.542
1989	10.761
1990	10.78
1991	10.52
1992	10.33
1993	10.24
1994	10.14
1995	9.91
1996	9.79
1997	9.88
1998	9.86
1999	10.03
2000	9.8
2001	9.55
2002	9.52
2003	9.42
2004	9.68
2005	9.37
2006	9.31
2007	9.28
2008	9.16
2009	9.04
2010	8.84
2011	8.9
2012	8.87
2013	9.01
2014	8.87
2015	8.99
2016	8.75