Year	Cases per 100,000
1953	14.74
1954	15.42
1955	14.24
1956	14.43
1957	14.95
1958	16.14
1959	15.04
1960	15.72
1961	15.17
1962	13.78
1963	15.54
1964	16.49
1965	16.45
1966	15.97
1967	17.13
1968	16.26
1969	17.57
1970	18.81
1971	17.5395
1972	18.479
1973	18.2085
1974	21.318
1975	18.2975
1976	18.697
1977	19.2965
1978	18.106
1979	16.0255
1980	15.725
1981	16.2045
1982	16.014
1983	15.1735
1984	13.613
1985	14.3325
1986	13.532
1987	12.9815
1988	13.241
1989	13.3105
1990	15.66
1991	15.64
1992	15.31
1993	14.83
1994	14.37
1995	14.19
1996	14.28
1997	14.06
1998	14.1
1999	13.66
2000	13.36
2001	13.21
2002	12.96
2003	12.83
2004	12.66
2005	12.44
2006	12.23
2007	12.04
2008	11.94
2009	11.65
2010	11.42
2011	11.1
2012	10.75
2013	10.58
2014	10.16
2015	10.05
2016	10.01