Year	Cases per 100,000
1958	32.06
1959	29.64
1960	37.14
1961	36.25
1962	25.25
1963	19.81
1964	21.69
1965	17.54
1966	23.45
1967	18.5
1968	19.68
1969	18.96
1970	12.26
1971	14.5375
1972	19.985
1973	15.0225
1974	16.05
1975	18.2175
1976	18.545
1977	18.2025
1978	18.25
1979	11.5875
1980	10.495
1981	13.9825
1982	17.02
1983	17.3975
1984	13.235
1985	12.2525
1986	11.51
1987	13.0975
1988	14.725
1989	19.0025
1990	12.25
1991	12.2
1992	11.87
1993	11.73
1994	11.58
1995	11.14
1996	10.78
1997	10.6
1998	10.25
1999	9.97
2000	9.84
2001	9.81
2002	9.51
2003	9.12
2004	8.84
2005	8.64
2006	8.5
2007	8.23
2008	7.89
2009	7.66
2010	7.82
2011	7.9
2012	7.83
2013	7.96
2014	8.07
2015	8.13
2016	8.08