Year	Cases per 100,000
1963	24.62
1964	23.2
1965	21.16
1966	21.18
1967	21.55
1968	22.12
1969	19.15
1970	18.21
1971	21.2535
1972	19.147
1973	19.6305
1974	18.774
1975	17.2575
1976	19.741
1977	17.5245
1978	17.888
1979	19.9415
1980	16.235
1981	16.6885
1982	14.882
1983	14.9155
1984	15.149
1985	17.9725
1986	17.256
1987	16.4395
1988	14.493
1989	14.4765
1990	15.83
1991	15.99
1992	15.4
1993	15.31
1994	14.88
1995	14.47
1996	13.92
1997	13.54
1998	13.23
1999	12.82
2000	12.33
2001	11.88
2002	11.47
2003	11.27
2004	10.99
2005	10.74
2006	10.23
2007	10.19
2008	9.83
2009	9.56
2010	9.39
2011	9.23
2012	9.11
2013	8.83
2014	8.36
2015	8.44
2016	8.53