Year	Cases per 100,000
1953	39.59
1954	37.18
1955	36.45
1956	33.3
1957	32.4
1958	31.92
1959	30.99
1960	28.97
1961	27.27
1962	25.3
1963	23.45
1964	23.6
1965	21.85
1966	21.4
1967	19.2
1968	19.11
1969	17.61
1970	18.12
1971	16.821
1972	17.792
1973	15.543
1974	15.964
1975	14.765
1976	15.706
1977	15.337
1978	15.678
1979	16.319
1980	15.64
1981	15.931
1982	15.512
1983	16.133
1984	15.744
1985	15.095
1986	15.256
1987	15.657
1988	15.738
1989	14.719
1990	14.8
1991	14.06
1992	13.29
1993	12.71
1994	11.91
1995	11.31
1996	10.96
1997	10.49
1998	9.97
1999	9.52
2000	9.19
2001	8.87
2002	8.51
2003	8.21
2004	7.95
2005	7.6
2006	7.31
2007	7.03
2008	6.82
2009	6.55
2010	6.35
2011	6.24
2012	6.14
2013	6.06
2014	5.84
2015	5.8
2016	5.67