Year	Cases per 100,000
1958	7.45
1959	16.44
1960	14.94
1961	15.41
1962	13.25
1963	13.7
1964	13.36
1965	11.19
1966	16.49
1967	17.84
1968	16.21
1969	15.54
1970	22.86
1971	19.748
1972	16.816
1973	15.634
1974	17.432
1975	29.07
1976	23.038
1977	29.476
1978	25.234
1979	30.292
1980	36.68
1981	38.698
1982	29.976
1983	41.184
1984	41.232
1985	41.95
1986	36.098
1987	43.906
1988	38.114
1989	37.432
1990	44.78
1991	44.99
1992	43.64
1993	43.79
1994	43.99
1995	44.45
1996	44.99
1997	45.3
1998	44.27
1999	43.86
2000	43.74
2001	43.57
2002	42.85
2003	42.43
2004	42.1
2005	42.39
2006	42.2
2007	41.9
2008	40.52
2009	40.15
2010	40.77
2011	40.93
2012	40.78
2013	41.06
2014	40.78
2015	40.44
2016	41.44