Year	Cases per 100,000
1958	28.84
1959	28.57
1960	26.24
1961	25.31
1962	25.61
1963	25.1
1964	23.59
1965	24.71
1966	21.95
1967	21.98
1968	20.79
1969	20.66
1970	20.22
1971	18.927
1972	19.174
1973	20.251
1974	19.468
1975	18.745
1976	19.282
1977	17.969
1978	18.336
1979	19.023
1980	18.39
1981	18.297
1982	18.514
1983	18.521
1984	17.878
1985	18.565
1986	17.402
1987	17.499
1988	17.416
1989	18.053
1990	17.46
1991	16.88
1992	16.16
1993	15.63
1994	15.12
1995	14.77
1996	14.46
1997	14.06
1998	13.54
1999	13.09
2000	12.44
2001	12.02
2002	11.59
2003	11.25
2004	10.98
2005	10.6
2006	10.13
2007	9.85
2008	9.55
2009	9.25
2010	9.01
2011	9.03
2012	8.96
2013	8.91
2014	8.78
2015	8.86
2016	8.97