Year	Cases per 100,000
1958	3.69
1959	3.59
1960	3.33
1961	3.46
1962	4.32
1963	4.19
1964	4.08
1965	4.61
1966	3.99
1967	4.35
1968	4.96
1969	5.4
1970	5.49
1971	5.52
1972	5.84
1973	6.52
1974	7.21
1975	7.35
1976	7.55
1977	7.59
1978	8.2
1979	8.68
1980	10.13
1981	10.25
1982	10.84
1983	11.43
1984	11.69
1985	12.21
1986	12.63
1987	13.98
1988	13.52
1989	13.85
1990	14.4
1991	14.87
1992	15.17
1993	15.49
1994	16.04
1995	16.69
1996	17.29
1997	17.63
1998	18.23
1999	19.13
2000	20.15
2001	20.69
2002	21.04
2003	21.6
2004	22.65
2005	23.12
2006	23.08
2007	23.38
2008	23.54
2009	23.43
2010	23.19
2011	23.43
2012	23.78
2013	23.91
2014	23.74
2015	23.5
2016	23.24