Year	Cases per 100,000
1953	22.84
1954	22.67
1955	24.59
1956	21.28
1957	20.7
1958	21.09
1959	21.11
1960	19.35
1961	16.49
1962	15.91
1963	18.78
1964	16.69
1965	16.03
1966	14.23
1967	15.24
1968	13.38
1969	13.81
1970	13.62
1971	11.9765
1972	10.993
1973	11.5295
1974	12.026
1975	10.7025
1976	11.369
1977	10.3855
1978	10.352
1979	11.3485
1980	11.325
1981	10.6015
1982	10.758
1983	11.1645
1984	10.531
1985	10.6175
1986	10.584
1987	10.3105
1988	10.147
1989	10.0735
1990	10.27
1991	10.03
1992	9.69
1993	9.43
1994	9.14
1995	8.85
1996	8.49
1997	8.2
1998	7.86
1999	7.66
2000	7.47
2001	7.35
2002	7.28
2003	7
2004	6.8
2005	6.67
2006	6.43
2007	6.27
2008	6.07
2009	5.93
2010	5.81
2011	5.74
2012	5.63
2013	5.5
2014	5.34
2015	5.32
2016	5.29